Aparagraph that can serve the specific purpose of creating a special effect within the essay is called a
topical paragraph
unified passage
functional paragraph
paragraph block

C) functional paragraph
writers use functional paragraphs to present a special effect.

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.