Both b and c, BB being both homozygous for brown eyes, and Bb being heterozygous being B= brown / b= blue & since Brown eyes are dominate over blue eyes it would certainly have a much higher percentage (75%/100%) of having brown eyes rather than blue eyes
Genetic variation is when there are many offspring with different genetics, therefore some offspring might be able to adapt due to its genetics
D?!? Let me know if you get it right
I am guessing its the chlorophyll. <span />