The Sahara's sand seas (ergs) and dunes are formed by strong desert winds.
O True
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Ergs are formed by the action of winds. Sand dunes can migrate and increase their number in certain areas over many thousands of years. Large regions of sand were originally formed when the land was covered by a shallow sea. The action of waves over very long periods of time can erode rocks to form sand.

Explanation:

"the sepoy rebellion was the result of many, many influences and stressors on the cultures of india living under british rule. in britain, it's called the sepoy mutiny on the indian mutiny, but in india, it's called the first war of independence.

the main reason is concerned to the british paramountcy , the belief in british   dominance in india political, economic and cultural life had been introduced in india about 1820."

"they were forced to grow crops that benefited the colonizing nations instead of feeding their own people."

it granted civil rights to african americans.