Question

lake chad’s disappearance and the increase in vegetation in the region was a quick, sudden change. lake chad’s disappearance and the decrease in vegetation in the region was a gradual change over time. lake chad’s disappearance and the increase in vegetation in the region was a gradual change over time. lake chad’s disappearance and the decrease in vegetation in the region was a quick, sudden change.

Explanation:

Lake Chad's shrinkage and associated vegetation - related changes are the result of long - term factors such as climate change, water extraction, and land use changes, which occur gradually over time.

Answer:

Lake Chad’s disappearance and the decrease in vegetation in the region was a gradual change over time.