d. Anemia 10. The percentage of irrigation water reaching the roots of plants a. Irrigation b. Hydroponics C.Efficiency d. Pesticides

The correct answer is c. Efficiency.<br /><br />The percentage of irrigation water that reaches the roots of plants is referred to as the efficiency of the irrigation system. It measures how effectively the water is delivered to the plants and how much of the water is actually used by the plants, as opposed to being lost through evaporation, runoff, or other factors.