Reduce the risk of waterborne disease
There are more than simply 4 biological compounds in the human body. I suppose to categorise, the question is hinting towards the molecules like Carbohydrates ( Poly and mono saccharides ) Proteins ( Polypeptides Made of amino acids) and Fats. There is also water, but I'm hesitant to class that as a biological compound, as it's not organic.
Every cell has a cytoplasm
Answer:
they have inexpensive start- up costs.
Explanation:
Nuclear power plants are expensive to build but relatively cheap to run.
An example of homeostasis would be sweating when the temperature is hot.