What does every paragraph in an essay should have ?
a. cause-and-effect signal words to indicate key relationships.
b. a written appeal to the audience.
c. a topic sentence that states the main idea.
d. three supporting paragraphs.

c. a topic sentence that states the main idea.

Explanation:

Usually, the basic rule of writing an essay is to divide the essay into three parts, introduction, body, and conclusion. The paragraphs include pointing the main ideas and mentioning them in the essay. The topic sentence contained in the paragraph focuses on what the paragraph is all about. The inclusion of examples and evidence in support of it helps in emphasizing the main idea.

no