The lava that flows from a volcano is caused by pressure underneath the Earth's surface. This
pressure is caused by
a ) heat trapped deep under the earths surface
b ) earthquakes that occur in the earth core
c ) chemical weathering that occurs under the earths surface
d ) human activities that impact the lava flow

A. I believe is the answer.

Explanation:

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !