Please help: Does diffusion require energy?

Diffusion is a form of passive transport, which implies that it does not require the use of energy. Diffusion is defined as the movement of particles from an area of higher concentration to an area of lower concentration. In other words, particles experiencing diffusion move “down their concentration gradient."

I got it from google, sorry if it's wrong, just tryna help

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes