Evaporation helps naturally clean water resources for plants and animals.?

It does it evaporates ponds or lakes even puddles and it makes it rain so it can give plants a source of water and animals a source of food and drink.

Explanation:

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

answer; ( suicide );