He discovered choice C! this is because atoms of the same element can have different numbers of neutrons
C. Ninhydrin is used to detect prints on a non-porous surface
Answer:
Because it keeps track of all the elements
It shows that the population is moving towards a more organic and natural way of growing crops. Rather than using fertilizer and putting toxins on the plants that we eat from, we are getting smarter and growing food naturally. Thus not killing ourselves in the process.
