An organic molecule will always contain CARBON.
The correct option is A.
An organic molecule or compound refers to a chemical entity in which one or more atoms of carbon are bonded covalently with atoms of other elements. Because of the number of valence electron that carbon possess, it has the capacity to form different types of chemical bond with different types of elements.
I'll say Graph C cause both Graph A and Graph C look slighty different but both are close to being the same but in Graph C it shows different Figures Both don't match each other hence Population of birds in Graph C are specialized in different types of food.