The major processes that heat the interiors of the terrestrial worlds are

A) (1 ) Heat deposited as the planets were built from planetesimals; (2 ) heat of accretion; (3 ) heat that came from the gravitational potential energy of incoming planetesimals.
B) (1 ) Heat of accretion; (2 ) heat from convection; (3 ) heat from thermal radiation.
C) (1 ) Heat deposited as the planets were built from planetesimals; (2 ) heat deposited as the planets underwent differentiation; (3 ) heat released by radioactive decay.
D) (1 ) Volcanism; (2 ) tectonics; (3 ) erosion.


C

Physics & Space Science

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