So its just easy now to match the layer labelled in the given sample with the standard that I attached.
Therefore B would be the
White Blood cells and these are responsible for the defense of the body from the invasion of foreign objects. Thus
Option 4
Answer: a niche is a role that an organism plays in an environment. If you want a dictionary definition, here it is.
Explanation:
a position or role taken by a kind of organism within its community. Such a position may be occupied by different organisms in different localities, e.g., antelopes in Africa and kangaroos in Australia
I did this with my teacher , it’s B