Which percentage of american adults do not exercise on a regular basis?
a.
40%
b.
50%
c.
55%
d.
60%

B

50%

Explanation:

That’s the answer on ed2020

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.