The statement " The Earth’s plates never move" is not a part of the theory of plate tectonics because the theory asserts that the Earth's plates do indeed move and their interactions at plate boundaries are felt. The Option B is correct.
The theory of plate tectonics is a fundamental concept in geology that explains the movement of the Earth's lithospheric plates. This theory is based on the understanding that the Earth's outer shell is divided into several large and smaller pieces known as tectonic plates (D).
These plates do not remain stationary but instead, they float on the semi-fluid asthenosphere beneath them. Tectonic activity primarily occurs at the boundaries between these plates, where they can move apart (divergent boundaries), move together (convergent boundaries) or slide past each other (transform boundaries).
The full question is:
Which of the following statements is not a part of the theory of plate tectonics?
A. Plates float on top of the Earth’s mantle.
B. The Earth’s plates never move.
C. Tectonic activity happens at plate boundaries.
D. The Earth’s crust is composed of many plates.