How did Kush contribute to Egyptian culture?

Olive oil and wine!

Explanation:

Egypt was able to provide the Kush with Greek wine and olive oil, both sold at very high profits for the Egyptians. The Kush too resold goods from other cultures, from ostrich feathers for the clothing of pharaohs to incense, acquired cheaply via a shorter trade route with Yemen.

c it says nothing about connecting those 2 seas.

panamal canal treaty and iran hostage crisis hope this