Active transport
or
passive transport

Passive transport

Explanation:

Passive transport is transport of substances without the requirement of energy. In contrast, active transport is the movement of substances that requires energy.

In the picture, the molecules are moving from a high concentration to a low concentration. This is transport down a concentration gradient, rather than against a concentration gradient.

Transporting molecules down the concentration gradient does not require energy, and is therefore passive transport.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.