Question

How do scientists know that the mantle is less rigid than crustal rocks?

Scientists use seismic waves to collect information about the mantle.
Scientists have collected samples from the mantle.
Satellite images provide information about the mantle.
Scientists use materials from volcanic eruptions to study the mantle.

Answer 1

Scientists have collected samples from the mantle.

Step-by-step explanation:

Answer 2

it is the first one

Step-by-step explanation:

i looked it up