Technically, the only way to correctly answer this question is to read the document itself but the answers pretty simple to answer without it too.
The Nile was the holy grail for the people of ancient Egypt. After all, it provided water to drink, and also water for agriculture. It also provided the Egyptians with many fertile lands that were great for farming. Because of this, they prayed to their gods all the time so that the Nile wouldn't dry out.
A. Enlightenment
The caste system is exclusive to Hinduism in this case, Hinduism did not have one founder, and neither Buddhism or Hinduism sought to actively convert people into their religions. Both Hinduism and Buddhism, however, believed in rebirth and eventual enlightenment.
I beleive it's Nation Y imports precious metals, minerals, and agricultural products from country X.
But I'm not 100% sure.
I believe it’s Pedro Álvares Cabral
Hope it helps : )
The answer to this question is D.