What change made Byzantium more powerful?
Defensive walls were built around the city,
The region began to recover from civil wars,
The emperor seized more power from the military,
Constantine seized Christian churches and their wealth.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

your answer will most likely be a.

a marriage ending by the death of a husband or wife.

explanation:

i don't see your choices but i'm just gonna give you my answer.