The upper portion of the Earth is known as:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Lithosphere.
The upper portion of the Earth is known as the lithosphere. It is the rigid outer layer of the Earth, which includes the crust and the uppermost part of the mantle. The lithosphere is broken into tectonic plates that float on the semi-fluid asthenosphere beneath them. This layer plays a crucial role in various geological processes, including the formation of mountains, earthquakes, and volcanic activity. It supports life and houses natural resources that are essential for human activities.