Evidence supporting the theory of plate tectonics includes geological, paleontological, and geophysical data. Key types of evidence are fossil records, which show similarities across continents, and the fit of the coastlines of Africa and South America. Additionally, earthquake frequencies and distribution, volcanic activity, and sea-floor spreading at mid-ocean ridges provide strong support for this theory. This evidence demonstrates that tectonic plates move and interact, shaping the Earth's surface over geological timescales.