Determining the most difficult subject of study objectively can be challenging as it varies from person to person based on individual strengths and interests. However, subjects like advanced mathematics, theoretical physics, and organic chemistry are often considered difficult due to their complex concepts and abstract nature. These subjects require a high level of critical thinking, problem-solving skills, and a strong foundation in prerequisite knowledge, making them challenging for many students. Ultimately, the difficulty of a subject is subjective and can depend on the individual's aptitude and interest in the topic. **

It is difficult to determine what is objectively better as it often depends on individual preferences and needs. For example, some may argue that a larger car is objectively better for transporting more people and cargo, while others may argue that a smaller car is objectively better for fuel efficiency and maneuverability. Ultimately, what is objectively better depends on the specific criteria being considered and the context in which it is being evaluated. **

While it is possible for people to strive for objectivity in their thinking, complete objectivity may be difficult to achieve. Our thoughts and beliefs are often influenced by our personal experiences, biases, and emotions, which can cloud our judgment. However, by being aware of these influences and actively seeking out different perspectives, individuals can work towards thinking more objectively. It is important to recognize that achieving complete objectivity may be challenging, but making a conscious effort to consider multiple viewpoints can help in making more rational and informed decisions. **

Sand can be objectively blocked by physical barriers such as walls, fences, or other solid structures that prevent the movement of sand particles. Additionally, vegetation and plant roots can also act as a barrier to sand movement by stabilizing the soil and preventing erosion. In some cases, human-made barriers such as sandbags or geotextiles can be used to block the movement of sand in specific areas. Overall, any physical obstruction that prevents the natural movement of sand can be considered an objective block to its movement. **

It is difficult for something to be viewed completely objectively, as everyone brings their own perspectives, biases, and experiences to their interpretation of events or information. However, it is possible to strive for objectivity by considering multiple viewpoints, gathering evidence, and being aware of one's own biases. By actively seeking to understand different perspectives and critically evaluating information, individuals can work towards a more objective understanding of a situation. Ultimately, complete objectivity may be unattainable, but the effort to approach things with an open mind and critical thinking can lead to a more balanced and informed perspective. **

While teachers strive to be objective in their teaching practices, it is important to acknowledge that they are human and may bring their own biases and perspectives into the classroom. Factors such as personal experiences, beliefs, and cultural background can influence a teacher's objectivity. It is crucial for teachers to be aware of their biases and work towards maintaining objectivity in their interactions with students to ensure fair and equitable treatment for all. **

Music, like any form of art, is subjective and what one person may consider bad, another may enjoy. While there are certain technical aspects of music that can be objectively evaluated, such as pitch accuracy or rhythm consistency, overall enjoyment and appreciation of music is a personal experience. What one person may perceive as bad music may hold value or meaning for someone else, making it difficult to definitively label music as objectively bad. **

Selfies are self-portrait photographs typically taken with a smartphone or camera held at arm's length. They have become popular with the rise of social media platforms like Instagram and Snapchat. Selfies are often used to capture a moment, express one's mood or style, or simply to share with friends and followers. The term "selfie" was officially added to the Oxford English Dictionary in 2013, reflecting its widespread use and cultural significance. **