Question

what happens when the seafloor spreads?
new crust forms near the continental slope.
new crust moves away from the mid - ocean rift.
basalt cools to form a new crust near the mid - ocean rift.
old crust moves closer together.

Explanation:

Seafloor spreading occurs at mid-ocean rifts, where magma (which forms basalt as it cools) rises to create new crust. This new crust then moves outward from the rift, while old crust moves apart, not closer. New crust does not form near continental slopes.

Answer:

B. New crust moves away from the mid-ocean rift.
C. Basalt cools to form a new crust near the mid-ocean rift.