Question

What finally caused scientists to accept the plate tectonics theory?

Matching glacier scraping patterns on the coasts of different contents

Fossil evidence of supercontinents like Pangaea

Magnetic pole wandering alignment of repositioned plates

Ocean floor evidence of seafloor spreading

Answer 1

Ocean floor evidence of seafloor spreading.

Explanation: mapping of the ocean floor in the 1950s–60s revealed mid‑ocean ridges, symmetric patterns of magnetic reversals on either side of ridges, and progressively older crust away from the ridges. That direct, measurable record of new crust forming and moving apart provided the mechanism (and quantifiable data) that made plate tectonics widely accepted. Earlier clues (matching coasts, fossils, glacial marks, apparent polar wander) were important, but the seafloor evidence was the decisive proof.