How did the physical environment of river valleys negatively impact ancient civilizations? The land was attractive to outside invaders who wished to conquer the land. Rivers prevented the people from moving because they could not cross them. Occasionally, extreme flooding caused great damage and killed many people. Silt in the rivers made the water dirty and possibly unsafe for people to drink.

C

Explanation:

How did the physical environment of river valleys negatively impact ancient civilizations?

The land was attractive to outside invaders who wished to conquer the land.

Rivers prevented the people from moving because they could not cross them.

Occasionally, extreme flooding caused great damage and killed many people.

Silt in the rivers made the water dirty and possibly unsafe for people to drink.

answer; i believe the correct answer is (b) dutch van der linde

are you referring to matrix mathematics!