I thinks it is a NUTRIENT
<span>for accurate results, for example when they are making vaccines, these are weakened harmful or disease causing viruses,, too little of the virus then it would not be a vaccine or simply would not build you antibodies, and too much of it would not also not a vaccine since it will already inflict a disease or possibly be fatal</span>
Answer:
C. It uses a renewable resources
Either C or D. I think C, but I'm not too sure...
