Which of the following are examples of physical systems? the gulf stream, the lincoln tunnel, the amazon rain forest, the san andreas fault, the california gold mine

Following are the examples of 'physical systems':

The Amazon rain forest, the Gulf Stream and the San Andreas fault.

Explanation:

In the discipline of Geography, a physical system is one that has a few natural characteristics and specifications of its own, has a defined natural procedure of functioning, and moreover, it interacts with the surrounding environment naturally. Thus, the Lincoln Tunnel and the California Gold Mine do not make a physical system as far as the subject matter of Geography is concerned.

Answer barren with few trees, in the northern hemisphere;