Question

Organizing sentences around a central idea creates a/an

A. comparison.
B. paragraph.
C. supporting detail.
D. introduction.

Answer 1

It would create a paragraph keeping things tidy and in order

Answer 2

B <<<=== It couldn't be anything else.
A paragraph is dedicated to one central idea. The idea is stated or implied. When all is said about the idea the author wants to say, then a new paragraph with a new idea is started.