The part of the plant responsible for water absorption is the root. Roots anchor the plant into the soil and facilitate the uptake of water and essential nutrients from the ground. They have specialized structures, such as root hairs, that increase surface area for absorption. Furthermore, roots play a crucial role in the overall health and growth of a plant, enabling it to withstand drought and support metabolic processes by supplying adequate water needed for functions like photosynthesis and nutrient transport.