Answer:
Irrigation
Step-by-step explanation:
The techniques used by Ancient Egyptians and people living in Mesopotamia to meet their water and food needs was majorly irrigation .
The irrigation channels were majorly from the River Nile as water was usually fetched and then carried by oxens to farmlands and other areas which needed it. This was usually common in periods of drought where there was a decrease in water availability as a result of low or no rainfall.