The right answer is C. 
Living beings are made of water! 
All living things are mostly composed of water. For example, plants contain between 80 to 85% water and men nearly 70%. 
The plants are almost entirely composed of water; It is indispensable to him for: 
*transport the mineral elements from the soil 
*transport the living matter elaborated in its different parts 
*sweat and breathe 
Humans and animals are partly made up of water and they use water for their operation, regulating their temperature and disposing of their waste.