What does "proclivity" mean?

The term "proclivity" refers to a natural inclination or tendency towards a particular behavior or characteristic. It often implies a predisposition that is inherent to an individual, suggesting that they have a strong preference or tendency to engage in certain activities or thoughts. This is why the choice indicating a natural inclination is the correct answer.

In contrast, the other options do not capture the essence of the word. Official approval refers to an endorsement or authorization from an authority, which is unrelated to personal tendencies. Pleasing to the ear describes something that sounds good or harmonious, which does not connect to the idea of personal inclination. Arrogance refers to an attitude of superiority or self-importance, which is also distinct from the concept of proclivity. Thus, the selection of the answer that denotes a natural inclination aligns perfectly with the definition of "proclivity."