In an age-structure pyramid, the most critical age span for women in order to determine the current fertility rate potential is

In an age-structure pyramid, the most critical age span for women in order to determine the current fertility rate potential is: 15-49
Past this age, Women's uterus will become significantly weaker compared to their younger ages. This make them unable to sustain the living of their infants through natural reproductive method. On top of that, they will also stop ovulating when surpassing this age group.

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 !