A. Label each step in the water cycle, using the words condensation, evaporation, precipitation, and solar energy.
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The first one that points to the arrows under the sun is solar energy. The second one that points to the arrows below the could is evaporation. The third one that points at the cloud is condenstaion. The fourth one that points to the rain is precipitation.

Explanation:

Solar energy: Energy from the sun

Evaporation:  The process by which water changes from a liquid to a gas or vapor.

Condensation: Water which collects as droplets on a cold surface when humid air is in contact with it. (MAKES CLOUDS)

Precipitation: Rain, snow, sleet, or hail that falls to the ground.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.