It should be A. It is universal among all life on Earth.
It would be A keeping lakes and rivers free of pollution im pretty sure im on the question myself but im pretty sure that i got it right.
Answer:
a hygrometer consisting of a wet-bulb and a dry-bulb thermometer, the difference in the two thermometer readings being used to determine atmospheric humidity.
a hygrometer is an instrument for measuring the humidity of the air or a gas.
Answer:
Explanation:
Photosynthesis use carbon dioxide and water to assemble carbohydrate molecules and release oxygen into the air easy
