Final answer:
The atmosphere plays an important role in maintaining Earth's freshwater supply by refilling lakes and rivers with precipitation and providing organisms with gases needed for life.
Step-by-step explanation:
The atmosphere plays an important part in maintaining Earth's freshwater supply. It is part of the water cycle. It refills lakes and rivers with precipitation. The atmosphere also provides organisms with gases needed for life. It contains oxygen for cellular respiration and carbon dioxide for photosynthesis.