In which of the following will substances move from areas of lower concentration to areas of higher concentrations?
a. osmosis
b. facilitated diffusion
c. diffusion
d. active transport

The question says,' in which of the following will substances move from areas of lower concentration to areas of higher concebtration. The correct option is D. Active transport is the movement of molecules across a cell membrane into a region of higher concentration. This process require energy and is usually catalysed by enzymes.