Definitely D. Because we just learned about this in science
Answer:1..Binomial System
2..genus and species
Explanation:
In this question, there are no options given to choose from. So i would answer this question based on my knowledge. The most likely cause of the observed variation is adaptation and evolution. The birds of that island adapted to the food source and then they evolved as per the requirement of the place and food source.
Biochemical- apart of the second defense system
