The sparse population in the middle belt of West Africa can …

The sparse population in the middle belt of West Africa can be traced to all of the following except

  1. inter-ethnic war
  2. Arab slave trade in the North
  3. tsetse fly infestation
  4. concentration of industries ✓

Explanation

This answer correctly identifies the geographic concept or location. Geography helps us understand the Earth and how humans interact with it.

The other options describe different geographic features or concepts. They don’t match what the question is asking for.

Remember this geographic fact when studying maps, climates, and how places are connected.