What geographical feature made possible the union of upper and lower egypt?

The Nile River is the geographical feature that made possible the union of Upper and Lower Egypt.

Commonly regarded as the longest river in the world, the Nile is the major north-flowing river in northeastern Africa, though some sources has given the title of the longest river to the Amazon River.

explanation: d

"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."