Fact 1: Tectonic plates being pushed together causes earthquakes. Fact 2: Earthquake tremors and volcanic activity are frequent. Given the two facts above, what causes tremors?

(A). tectonic plates coliding;
(B). fissures of hot, acidic water;
(C). sensory neurons;
(D). energy of moving objects;
(E). Thyroid-stimulating hormone;
(F). storms;
(G). the sun;
(H). richter scale;
Answer:
(A).