Diffusion is the spontaneous movement of a substance from an area of concentration to an area of concentration. A
high; similar

B
higher; lower

C
lower; higher

D
low; similar

The answer is B

Explanation:

(B ) higher; lower.

Explanation:

Diffusion is the spontaneous movement of a substance from an area of higher concentration to an area of lower concentration.

d) center of the mid-ocean ridge

give brainleysest

sinserly,

steckh986

and after water is usually warmed by the sun the water temperature raises and then evaporates .