which event in earth’s history most directly allowed life to exist on land?\nearth’s temperatures increased…

which event in earth’s history most directly allowed life to exist on land?\nearth’s temperatures increased, causing widespread evaporation.\nearth collided with a large object, forming the moon.\nsingle - celled organisms released oxygen into the air when they photosynthesized.\nsingle - celled organisms absorbed harmful gases from the air when they first formed.

which event in earth’s history most directly allowed life to exist on land?\nearth’s temperatures increased, causing widespread evaporation.\nearth collided with a large object, forming the moon.\nsingle - celled organisms released oxygen into the air when they photosynthesized.\nsingle - celled organisms absorbed harmful gases from the air when they first formed.

Answer

Answer:

Single - celled organisms released oxygen into the air when they photosynthesized.

Brief Explanations:

Oxygen is crucial for aerobic life on land. Photosynthesis by single - celled organisms increased atmospheric oxygen levels, enabling the evolution and survival of land - dwelling organisms.