Heat is most closely related toenergy.

Thermal energy.

Explanation:

Thermal energy can also be referred to as  heat energy. It is produced when  certain rise in a temperature makes some  atoms and molecules to drive faster and hit against each other. The said energy that emanates from the temperature of the heated substance is known to be thermal energy.

In an ecosystem, usually water from a nearby river or lake is pumped in and used for a cooling process. This causes an increase in the temperature of the water, causing less oxygen to dissolve in it. Many types of fishes which have a small tolerance range for oxygen dies off in this process.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: