Question

which process moves ions from an area of higher concentration to an area of lower concentration?
a diffusion
b osmosis
c endocytosis
d active transport

Explanation:

Diffusion is the movement of substances (including ions) from an area of higher concentration to an area of lower concentration. Osmosis is the diffusion of water across a semi - permeable membrane. Endocytosis is the process of taking substances into the cell by engulfing them. Active transport moves substances against the concentration gradient (from low to high concentration).

Answer:

A. diffusion