In the Earth’s Mantle, what material is moving constantly building up pressure? A Iron, Nickle
B Magma
C Ice and Fire
D Salt water

B. Magma

Explanation:

C and D are automatically out.

It is not A because Iron and Nickel are in the Earth's core.

So that leaves you with magma, and that's how volcanoes erupt because of the pressure the magma is under.

HOpe THis HElped!!

the answers for the whole quick check is

1. b

2. b

3. a

4. c

5. b

6. a

7. d