Question

which type of transport requires energy to move molecules from an area of lower concentration to an area of higher concentration?
isotonic
active
passive
diffusion
osmosis

Explanation:

Active transport moves molecules against the concentration gradient (from low to high concentration) and requires energy input, usually in the form of ATP. Isotonic refers to equal - concentration solutions, passive transport moves molecules down the concentration gradient without energy, diffusion is a type of passive transport, and osmosis is the diffusion of water across a semi - permeable membrane.

Answer:

active