What was the main reason for the decline of the Kingdom of Kush? Alexander the Great and his armies invaded and conquered the area. Widespread disease and diminishing trade led to its downfall. The Kingdom of Axum grew and dominated trade in the region. A drought along the Nile caused most of the population to leave.

Respuesta :

The kingdom of Kush declined because of the rise of a new power in the region known as Axum.

So....... The third option is the correct one.

Answer: the correct answer is the Kingdom of Axum grew and dominated trade in the region.

Explanation: the Kingdom of Aksum expanded its territory and became a major trade center. It was under King Ezana that Aksum conquered the Kingdom of Kush, destroying the city of Meroe. King Ezana converted and became a devout Christian and Christianity became the major religion of the kingdom.