Answer:
The rivers could flood too much (negitive). The rivers helped farm, transportation, drinking water, and irrigation(positive).
Explanation:
I hope this helps you. If not I can type more.
fill the cup with water when brushing your teeth, instead of letting it flow.
take shorter showers.
check for leaks
get water saving shower heads
if youre looking for simpler answers
I think its modern language association
1. The rulers who came to power after Charlemagne failed to defend the empire.
2. Europe was threatened by Muslims, Magyars, and Vikings in the 9th and 10th centuries.