Question

which statement about the theory of plate tectonics is true?
it states that the earths surface is broken into pieces.
it states that the earths plates move randomly.
it states that the earths plates do not move.
it states that the earths surface is a solid mass.

Explanation:

The theory of plate tectonics states that the Earth's lithosphere (surface layer) is broken into several large and small rigid plates. Plates move due to convection currents in the mantle, not randomly, and they do move (so options about random movement or no movement are wrong). The Earth's surface isn't a single solid mass (so that option is wrong). The first option correctly reflects the plate - breaking aspect of plate tectonics.

Answer:

A. It states that the earth's surface is broken into pieces.