Question

disappearance elsewhere on earth. while new crust is being formed, simultaneously, old crust is being remelted. thus the total volume of earths crust stays constant.

iceland provides a notable example, as it sits on a divergent boundary where the eurasian and north american plates are separating, causing distinct geological features such as rift valley. this makes it a prime location for studying plate tectonics.

what happens to the earths crust as new crust is formed at divergent boundaries?

the total crust volume remains constant.

the total crust volume decreases.

the total crust volume varies randomly.

Explanation:

The text explicitly states that while new crust forms at divergent boundaries, old crust is remelted elsewhere, keeping the total volume of Earth's crust constant. This directly supports the correct option.

Answer:

The total crust volume remains constant.