Which technique combines hydroponics and fish farming?

Aquaponics is the technique that effectively combines hydroponics, which is the method of growing plants in a water-based, nutrient-rich solution, with fish farming, known as aquaculture. This system creates a synergistic environment where fish waste provides an organic nutrient source for the plants, and in return, the plants help filter and purify the water, creating a sustainable and efficient agricultural practice.

This method not only maximizes space and resources but also promotes environmental sustainability by reducing the reliance on traditional soil-based agriculture and minimizing nutrient runoff.

The other options refer to different agricultural practices. Intensive cultivation focuses on high-yield farming techniques often involving the use of chemical inputs to maximize crop production, whereas extensive cultivation refers to farming that uses lower inputs and land areas are less intensively managed. Crop rotation is a practice of alternating the types of crops grown on a particular land over time to improve soil health and reduce pest and disease cycles. Each of these practices serves its own purpose but does not combine hydroponics and aquaculture as aquaponics does.