sentences within the paragraphs in the body of an essay will ________ introduce new ideas. support the topic…

Brief Explanations:

In an essay's body paragraphs, sentences support the topic - sentence of the paragraph and also contribute to supporting the overall thesis statement. While they may introduce new ideas related to the topic - sentence, their main function is support. Wrapping up ideas is more of a conclusion's role.

Answer:

B. support the topic sentence of the paragraph, C. support the thesis statement of the essay