Answer:
Passing through clay beds filters groundwater, purifying out soil, or organic materials, and contaminants to leave behind pure water that fills up aquifers.
Explanation:
I hope this help you .
Since an animal only becomes more complex, and not simpler, an ancestor to all organisms would have to be the most simple and primitive organism.
Answer:
a
a process that selects variations to help with survi al and that spreads the variation to more offspring
Explanation:
the weak don't survive the strong thrive
The answer should be Genes
