How do we know that the tectonic plates are still moving.

There are several ways that we can demonstrate that the plates are moving today. The most obvious manifestation of moving plates are earthquakes. These can occur in volcanoes or (small ones) by artificial explosions. But the vast majority of the world's earthquakes are caused by sudden movement on faults.

Explanation:

i'm sure the answer you are looking for would be

a. an ice age

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