Question

which homeostatic process moves particles against a concentration gradient?
dynamic equilibrium
passive transport
osmosis
active transport

Explanation:

Dynamic equilibrium is a state, not a process for moving particles against a gradient. Passive transport moves particles along a concentration gradient. Osmosis is a type of passive - transport of water across a semi - permeable membrane. Active transport uses energy to move particles against a concentration gradient.

Answer:

D. active transport