Gas masks help protect soldiers from the gas weapons used by the enemy.
Answer: RACE
Explanation:
That is the variable factor here is the RACE of the men in the study.
Tigris and Euphrates
are the readily available water resources that was crucial for the development of Mesopotamia
Explanation:
The region in the south west Asia Mesopotamia was a fertile plain and it was surrounded by mountains, plains and rivers. The rivers in this region provided the route to travel and the two rivers Tigris and Euphrates was very much needed to the development of Mesopotamia.
They made arrangements such that they can drain the water for irrigation from the water sources which were readily available. These rivers form many tributaries and they irrigate the fertile plains and provide water for agricultural purpose.
Answer:
If Presidents were elected for life, we would not be the same. Everything would not change and we wouldn't get a chance to see something new. If its a bad president, bad things will keep happening. But, f it's a good president, good things will happen.
Explanation:
