70 point
Describe, in a paragraph, the trends seen in the evolution of life on Earth.

Earth seems to show a clear trend; for example, it seems intuitive that there is a trend towards increasing complexity in living organisms. More recently evolved organisms, such as mammals, appear to be much more complex than organisms, such as bacteria, which have existed for a much longer period of time.

Explanation:

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heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.