I think the answer would be c. because for birds with longer beaks, it was easier to eat seeds off a cactus (for example), and for birds with shorter seeds, it was easier to eat seeds off the ground.
Answer:
As the population increases, the food supply, or the supply of another necessary resource, may decrease
Explanation:
<span>To provide a great deal of information at a glance</span>
Phenotype <span>refers to physical characteristics that are studied in genetics.</span>
