Which of the following is an example of a learned behavior?

a) birds competing for food in the feeder

b) birds singing to establish their territory

c) birds returning to a backyard bird feeder

d) birds scattering at the sight of a hawk

dogs is better and probably lizards.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

why do you want to cheat? i dont take it, so i dont know.

explanation:

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b is dominant over the allele for the white fur.