Answer:
This region was formed when cracks in the Earth's crust created a rift valley, which is a “valley created when the part of land between the cracks in the Earth's crust drops down”. Two major waterways that are located within this landform region are the St. Lawrence River and Lake Huron.
Explanation:
It is considered one region!
In the middle of the cell is the nucleus.
<span>Magma that reaches the surface is referred to as lava.</span>
your answer would be D: crust and outer part of the mantel
