Which method allows for the artificial watering of crops?

Irrigation is the method that allows for the artificial watering of crops. This agricultural practice involves redirecting water from various sources—such as rivers, lakes, or underground aquifers—through systems of ditches, canals, or pipes to deliver water directly to the fields where crops are grown.

The primary goal of irrigation is to facilitate agricultural productivity, especially in areas where rainfall is insufficient or inconsistent to support crop growth. It helps maintain optimal soil moisture levels, improving crop yields and allowing for the cultivation of crops in regions that would otherwise be unable to sustain them due to arid conditions.

Other methods mentioned, such as rainwater harvesting, involve collecting and storing rainwater for later use but do not represent a continuous or controlled supply of water like irrigation. Positioning of crops refers to the strategic placement of crops within an agricultural field but does not inherently involve water supply mechanisms. Natural rainfall, while crucial for agriculture, does not provide the reliability and control that irrigation systems can offer, especially in fluctuating climatic conditions.