Early irrigation systems brought river water to

Fields, is the right answer.

Explanation:

Irrigation is the employment of controlled volumes of water to seedlings at required periods. Irrigation accommodates to grow crops, manage panoramas, and revegetate disquieted clay in dry regions and throughout periods of less than normal rainfall. Frost protection, checking soil compression, suppressing weed germination in grain provinces are some of the other uses of Irrigation. Early irrigation systems brought river water to fields.