The niche is considered an animals role in an environment. It describes not only the habitat that the animal lives in, but what the organism does within the habitat. All abiotic and biotic factors are included in a niche, including abiotic factors like the temperature the organism can survive in, as well as the amount of sunlight and water needed for the organism to survive. Biotic factors include what the food source is for the organism, and the predators of the organism.
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D. It allows a variety of substances to dissolve in and around cells.
Explanation:
The shell of hydration is important to life because it allows a broad range of substances to dissolve in and around the cells. 
- The shell of hydration allow for water to dissolve a wide range of substances and disperse them uniformly in it. 
- Water serves a solvent capable of dissolving a wide range of substances because it forms a hydration shell round them. 
- This allow for materials to be in solution around the cell. 
- Diffusion and osmosis can readily now take place. 
Learn more: 
Hydration energy brainly.com/question/2868767
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Because of the way builds up in your body
        
             
        
        
        
It’s D “doing 100 sit ups in 5 minutes”