Question

which type of transport moves substances against the concentration gradient and requires energy? osmosis diffusion active transport

Explanation:

Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration across a semi - permeable membrane. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. Active transport is the movement of substances against the concentration gradient (from low to high concentration) and requires energy (usually in the form of ATP).

Answer:

active transport