Blood, urine, tissue/skin, saliva, hairs, etc.
Fire is not a living thing, and abiotic factors are the factors in an ecosystem that are non-living. So, fire is an abiotic factor in an ecosystem, though its not mentioned alot.
300 Identified and confirmed with the exception of 200 that still need to be evaluated.
Answer:
D. Lots of people die. Lots of people are born to make up for it. We can see this from the high orange and purple lines.