A Brain Exercise is where: Your brain does jumping jacks
You answer a question about health
You rub your head

The first one

Explanation:

the plates spread at mid-ocean ridges (they are divergent plate boundaries) which allows magma to rise through the weakness between the plates. the magma then emerges as lava from the boundary and cools, creating a new crust.

1. h

2.a

3. i

4. d

5. b

6.f

7.g

8.e

9.c

i hope that this is