Which statement concerning osmosis and active transport is not correct?
a: both endocytosis and active transport require cell energy.
b: osmosis requires cell energy while active transport does not.
c: is crossed out
d: diffusion of gases and other small molecules requires no energy on part of the cell.

i think the answer would be d

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.