Answer:
there could be earthquakes which causes the land to break apart(weathering). or their could be a flood which carries away sediments( erosion) or their could be really windy days that picks up rocks and moves them (deposition)
Cancer isn’t infectious nor is heart disease. Infectious diseases are things spread my bacteria or organisms.
Answer:
no loe broooooooooooooooooooooooooo
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Explanation:
Explanation:
Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
It's #1. Hope the answer helped.