Question

africas environmental issues test
what is desertification?
when fertile land turns into desert
when people move to cities
when a desert gets bigger
when trees are cut down

Explanation:

Desertification is the process by which fertile land gradually becomes desert, often due to factors like drought, inappropriate agriculture, and deforestation. The other options do not define desertification. People moving to cities is urban - ization, a desert getting bigger is not the same as desertification in terms of land - quality change, and cutting down trees is deforestation which can be a cause of desertification but not the definition itself.

Answer:

When fertile land turns into desert