Question

What is the solid part of a rocky planet? *

Answer 1

Answer:

The solid part of a rocky planet is the geosphere.

Explanation:

Geosphere; is correct because it is representing the surface and near-surface part of a rocky planet, which is the solid part of it.

Channel; is not correct because it is a term that can be used in several different manners in several different fileds, but it doesn't represent in any sense a solid part of a planet.

System; is not correct because it can refer to any kind of system.

Biospheres; is not correct because it is the sphere representing the living organisms and their habitats.