Respuesta :
proteins play an important role in maintaining all these things, proteins are necessary for the development and repair of bones or muscles,skin and blood.
The substance that plays the roles that are described is fat.
It should be noted that fats are vital for the maintenance of a healthy skin and hair. Fats also give energy to the body as well as the provision of fat-soluble vitamins in the blood.
Fat is also vital for the insulation of the body organs against shock. Also it's important for the maintenance of the body temperature, and the promotion of a healthy cell function
In conclusion, the correct option is A.
Read related link on:
https://brainly.com/question/19695951
