Answer:
drip irrigation
Step-by-step explanation:
The correct answer would be drip irrigation.
It is a small scale irrigation system that is usually set up to minimize water usage compared to other forms of irrigations. The system consists of different pipes that start from the water source and networks to the stands of plants. Control valves also exist and these ensure that water slowly drips directly to the root of plants. The drip could be either from the above or below the ground surface.
Due to the efficiency associated with dripping water directly to the root of plants which is where it is primarily needed, the drip irrigation system requires minimal water supply and is sustainable.