I need these answers asap im on a unit test How did Indus River Valley civilizations respond to flooding in their area?

Flooding provided enough water supply to help cities grow.
Farmers developed irrigation techniques in response to flooding.
Traders could travel easily due to the flooding from the monsoons.
Cities were easy targets for invasion due to flooding in river systems.

question 2 How did Chandra Gupta I obtain most of his land?

by marriage
by purchase
by trade
by war

#3
Why did Prince Siddhartha Gautama wander his kingdom for six years?

He looked for riches to help people in poverty.
He searched for a way to end suffering.
He needed to prove himself to his father.
He wanted to find medicine to heal the sick.

#4
How did geography contribute to the economic development of Harappa?

Harappa used the fertile land to hunt animals for trade with other cities.
Harappa used the Indus River to trade and become a major fishing city.
Harappa used floodwater in trade and stored it for later use.
Harappa used fertile land from the Indus River to farm and trade.