Why did farmers need to develop a system to control their water supply? (RACE . . . be sure to highlight your C with a highlighter)

1. seasonal

2. frictional unenployment

3. the number of the labor force multiplied by 100 and then subtract the number of unemployed.

4. 4%

5. an increase in prices

answer; passive listening;

answer; how people relate to each other and influence each other;