Question

which statement is true about the theory of plate tectonics and the theory of continental drift?
the theory of plate tectonics shows that continental movements could not have happened.
the theory of plate tectonics tells exactly where the continents were before pangaea divided.
the theory of plate tectonics explains how continental movements could occur.
the theory of plate tectonics shows that pangaea was impossible, but the continents did move.

Explanation:

• The theory of continental drift proposed that continents move, but lacked a mechanism. Plate tectonics provides that mechanism (convection currents in the mantle causing plate movement).
• Plate tectonics does not show continental movements couldn't happen (so first option wrong). It also doesn't tell exactly where continents were before Pangaea (so second option wrong). And it doesn't show Pangaea was impossible (so fourth option wrong).

Answer:

The theory of plate tectonics explains how continental movements could occur.