Answer: They used irrigation to bring water to crops and fields.
<span> you have one more </span>negative<span> number to multiply the result by – which makes it </span>negative<span>. And if you take a </span>negative<span> base, and you raise it to an even </span>power<span>, that's because if you multiply a </span>negative<span> times a </span>negative, you're going to get a positive
Answer:
Criteron validity is the correct answer.
Explanation:
