Why do researchers need a lot of data to monitor a species population?

Researchers need a lot of data to monitor a species population because the environment is very diverse in types of species found at different places .

What happens to one part of it could affect the population of other animals, humans, and may also effect the ecosystem of that certain environmental region .

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.

the answer is d p: cell, q: organ, r: organ system, s: tissue