Answer:
B) the relative deprivation principal.
Explanation:
Based on the information provided within the question it seems that Arthur's experience is best explained in terms of the relative deprivation principal. This principle basically explains the behaviors and actions of someone that believes that they deserve something that others possess. Which seems to be the case with Arthur, since he believes that he deserves a B or A solely because all his classmates got those grades.
I feel the answer is cell membrane .
The cell membrane is a semipermeable protection and covering for the cell.
Please mark me as brainliest, if this helped.
Decomposers break down dead organisms and other organic wastes and release inorganic molecules back to the environment. Food chains and food webs are diagrams that represent feeding relationships. They model how energy and matter move through ecosystems