What was charles darwin’s contribution to the theory of evolution?

Charles Darwin introduced the idea that organisms better adapted to their environment would tend to survive, reproduce, and increase in number.

Explanation:

Natural selection

:)

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.