Our current understanding of evolution is called a theory because it has been
supported repeatedly as new discoveries have been made.
proven to be exactly true as originally proposed.
corroborated by data that were gathered during a single experiment.
developed from the postulates of many scientists.

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explanation:

the answer is c) an oak tree

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.