A valley is noticeably lower than the surrounding area. What is one way a
valley might form?
A. Tectonic movements make folds and faults in the crust.
O
B. Magma rises at a divergent plate boundary.
O
C. Water, wind, or glaciers deposit new crust.
O
D. Continental plates slip past each other at a transform boundary.

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit