Which statement best describes the theory of plate tectonics?

Question

Plates sometimes move closer to one another.
Sections of Earth that shift are part of Earth’s asthenosphere.
Sections of Earth’s continents are in slow, constant movement.
Parts of the ocean floor move as they are carried by rift valleys.

Answer 1

The statement that best describes the theory of plate tectonics is:

"Sections of Earth’s continents are in slow, constant movement."

This captures the essence of plate tectonics, which explains how the Earth's lithosphere is divided into plates that move over the semi-fluid asthenosphere beneath them.