Which of the following best explains why many jovian moons have been more geologically active than the moon or mercury?
a) jovian moons are made mostly of ice that can melt and deform at lower temperatures than can the rock and metal that make up the moon and mercury.
b) the jovian moon are considerably larger than the moon and mercury and therefore have retained much more internal heat.
c) the jovian moons probably have far more internal heat generated by radioactive decay than do the moon and mercury.

The answer is A. Jovian moons are made mostly of ice that can melt and deform at lower temperatures than the rock and metal that make up the Moon and Mercury

Explanation: Jovian moons are moons of Jupiter. There are about 79 known moons in Jupiter. They are mostly made up of ice.

The main component of geological activity (change in surface features and landscapes of a planet) is heat. The ice that makes up Jovian moon can easily melt or deform compared to rock and metal that made up both Moon and Mercury. This as a result explains why there is more geological activities in Jovian moons compared to Moon and Mercury.

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