Answer :

A Terrestrial planet's interior need for it to be a geologically active world because a planet must be large enough to have sufficient radioactive material and it must be large enough to provide some insulation to retain from that heat

The tectonic plates activity on a planet is controlled by the amount of heat that is stored in the interior parts of planets after formation. if there is  larger the amount of heat, the more energy stored  is transfered to the surface in the form of geological activity.

The Earth and Venus are  geologically active worlds with related to  thick atmospheres. The Atmosphere  are formed and maintained by volcanic outgassing. Terrestrial planets have characteristics like heavy-metal core, at least one moon, and valleys, volcanoes, and craters.

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