Which sphere of Earth includes its molten interior?

The correct answer is B. Geosphere.

The geosphere includes all of Earth’s solid and molten interior, encompassing the rocks, minerals, and the Earth’s inner and outer core. It is one of the main spheres of Earth, along with the hydrosphere (water), atmosphere (air), and biosphere (life). If you have more questions or want to explore this topic further, feel free to ask!