When an author reveals what a character says, that is an example of

O comparing characters.

direct characterization.

O contrasting characters.

indirect characterization.

Succeed

Indirect characterization.

Explanation:

In a literary text, there are two types of characterization - direct and indirect. Direct characterization is when the characters are directly described or given their physical appearance.

Whereas indirect characterization is when the author did not provide any description of the character. Rather, the character is introduced to the readers through his actions, dialogue, and other descriptions which are not explicit. Thus, when an author reveals what a character says, he is indirectly providing the character.

Thus, the correct answer is the last option.