The asthenosphere and the lithosphere are parts of the Earth's geosphere. The correct answer is A.
If Smiley weighs more than Jill's car, Smiley is too heavy for the bridge.
A rift valley is a linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault. A rift valley is formed on a divergent plate boundary, a crustal extension or spreading apart of the surface, which is subsequently further deepened by the forces of erosion.
It's a form of weathering. If water gets into a crack in a rock and then freezes, it will expand, causing the crack to get bigger, which can happen continuously.
I hope this is the type of answer you wanted. :)
I would think that the layer of sandstone would be B. Younger than 300 million years because it's above the layer of limestone.
