How is velocity more than just speed? what else does it include?

The answer is (B) nobody else in your class wants to sit next to them

Explanation:

Since the bilayer is coupled in a particular way thanks to the exclusion of lipid molecules in the water. Since there is no interaction of lipids with water, they bind. The lipid bilayer forms bonds with each other, in this way, this lipid bilayer is less fluid and tends to transform into a more rigid layer.