Which of the following needs must be met to achieve sustainability? a. water b. energy c. environmental d. all of the above

The right answer is D.

In our body, we say that there are 4 elements that will coexist:

*Earth :the solid elements of the body.

*Water :blood, lymph and all the water contained in our cells (mentioned in the question).

*Air :the air we breathe and all the gases that will appear with the biological and chemical functions of the body (the environment, mentioned in the question).

*Fire :energy in the body brought in particular by the diet and then used by our cells, muscles, brain and body functions (energy, also mentioned in the question).