Which of the following would not be considered human phenomena?

The topography would not be considered human phenomena.

Explanation:

Human cause settlements on lands usually without interfering much with the topography of the land. Altering the land in order to change its topography is a difficult and expensive process. Rather than taking up the operations to alter the land, humans choose to make necessary adjustments as per the topography of the land in the structure that is to be built. The topography of a land is mostly changed by natural geologic events like earthquakes, landslides, faulting, flooding, etc.

Answertrue:

Physical systems is the answer