C I think , I might b wrong
From observing the transit times through Earth of waves generated by earthquakes
Desertification occurs<span> due to a decrease in vegetation. This can </span>happen<span> naturally due to a drought or can be caused by human activities. The lack of plants can cause changes to the land. Plants help shade the soil, so when plants are removed, the soil will be exposed to the sun and will dry out more quickly. So, I would say C. An area of forest is clear cut.
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All topographic maps used the same map legend because this is the most practical way to share symbols and colors. If every region had its own unique map legend, reading topographic maps would be a nightmare.
