In addition to a topic sentence, what else does a paragraph need?

a)
support

b)
support and a concluding sentence

c)
concluding sentence

d)
a thesis statement, topic sentence, support, and a concluding sentence

You need D) a thesis statement, topic sentence, support, and a concluding sentence

a) support is the correct option.

A paragraph has a topic sentence and this is followed by information that supports it. This can have examples, definitions, comparisons or facts.

These options are wrong:

b)support and a concluding sentence. This organization suits the last paragraph of an argumentative essay because there is a conclusion.

c)concluding sentence. This cannot follow a topic sentence because the paragraph  would be incomplete. There should be some support between the topic and the concluding sentences.

d)a thesis statement, topic sentence, support, and a concluding sentence. These are the steps of a whole essay , not of a paragraph.

you didn't finish the sentence , how am i gonna you if you didn't finish the sentence