Why are marine fossils often found in places like mountain tops? A: Animals that make shells migrate far away from the ocean

B: It is a common practice for people around the world to leave seashells at the tops of mountains

C: As seabeds dry out, rocks can be uplifted or relocated due to geologic activity

A: Animals that make shells migrate far away from the ocean

Step-by-step explanation:

The presence of limestone and ocean marine fossils at the top of these mountains is one of the key pieces of evidence cited that advanced the idea of plate tectonics (large chunks of the Earth's surface moving over molten rock in the Earth's core) when it was first proposed as a theory in 1915.

I think it's c