Describe how the beaks of the bird species d, e, f, and j that eat fruits and seeds differ from the beaks of the bird species that eat only nectar.

Some ways to describe why the beaks are different from the birds that will only eat nectar and the birds that eat fruit are; the nectar eating birds have longer and thinner beaks. The beaks of the fruit and seed eating birds have have shorter and thicker beaks. 

Iguess i would say diagrams would be most difficult subject too correct

Probably a behavioral adaptation