B. Both planets show evidence of volcanic activity.
Explanation:
The Evidence of the volcanism in both the planets is a case and consequence of them being closely developed in the past and thus have the common characteristics of the volcanic activities in their geologic history and have a hot and active layer of the mantle.
The surface comprised of 90% of the basalts and the 65% of the planet composed of the mosaic of the volcanoes and thus has a major role in forming the surface.
<u>The formation of these rocs about 2.5 bn years ago and the recent volcanic activity shows the presence of the more than 1000 volcanoes, which may have bee possible flooded by the lavas and an important component of the degassing.
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Shown by the presence of the creators and the volcanic hill mound and the zone of the methane gas flows.
A few comets draw nearer to the Sun and accordingly lose mass all the more rapidly.
Long-period comets (those which take over 200 years to orbit around the Sun) start from the Oort Cloud. Danish space expert Jan Oort suggested that comets live in an immense cloud at the external scopes of the close planetary system, a long ways past the orbit of Pluto. This came to be called as the Oort Cloud.
The major constituents of a comet are ice, dust and water.
Comets don't generally have tails. They build up a fluffy, shell-like cloud known as a coma, and one, two, or three tails when close to the Sun.
