The part of Earth's surface that is physically suitable for permanent human settlement is known as:

A. the ecumene.

B. the ecosystem.

C. the ecosphere.

D. the biosphere.

E. the biosystem.

Answer: ecumene

Explanation:

Ecumene is a term used by geographers to mean inhabited land. It generally refers to land where people have made their permanent home, and to all work areas that are considered occupied and used for agricultural or any other economic purpose