Perhaps you would like to know more about the believes of tibetan buddhists.

a. beliefs

b. beleaves

c. belifes

d. correct as is

a. beliefs

Explanation:

The correct word to use in this case is "beliefs." The word "believe" is correct when used as a verb ("believes" is also accurate when the verb is in present and in the third person). However, in this case, the correct part of speech of the word is noun. Identifying the parts of speech of words can be a useful strategy in order to check our spelling.