Question

Simple diffusion: requires energy utilizes proteins to move molecules across a membrane moves molecules against a concentration gradient cannot occur without a membrane present does not require energy

Answer 1

Answer;
Simple diffusion does not require energy.

Explanation;
Passive transport is a type of transport that does not require energy since it lets diffusion move molecules only down their concentration gradient.
Simple diffusion, osmosis, and facilitated diffusion are examples of passive transport.