Final answer:
Hydroponics, named as Option A, is the technique of growing plants in a water-based nutrient solution without soil. It is widely used in research and agriculture to precisely control the growth conditions and produce high yields of crops like lettuce and tomatoes.
Step-by-step explanation:
Growing plants without the use of soil is called hydroponics. This is Option A: Hydroponics.
Hydroponics is a method that facilitates plant growth in a water-based, nutrient-rich solution, eliminating the need for soil. Plants have their roots in the nutrient solution, which provides them with the necessary nutrients for growth. Researchers often employ hydroponics to control conditions precisely when studying nutrient deficiencies. Moreover, many commercial greenhouses have adopted hydroponics to grow a variety of produce, such as flowers, vegetables, and especially lettuces and tomatoes, which are common in grocery stores.
Hydroponics is a testament to human ingenuity in agriculture, allowing for controlled environment farming and often results in higher yields and less resource waste compared to traditional soil farming.