A is the right answer because it is.
Answer:
A population consists of all individuals of all species in one area
The number of organsims at each levels, so there are more producer than herbivores, more herbivores than carnivores and so on...
D. Evaluate
Explanation:
The team of ecologists failed to implement the evaluation stage of adaptive management approach as the didn't compare various possible methods that could be used for the managemenr process and evaluation refers to analysis of completed or ongoing activities related to the topic in consideration to determine the management effectiveness and efficiency. Since they forgot to evaluate the various possible methods, evaluation is the missed approach.
They are important because so people do not get sickness