What could be the reason that some birds hide their eggs on high trees on a certain island while others hide them between rocks on another island?

Different places, different predators, different environmental occurrences, which means the bird have to change their ways in order to protect their young.

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

1) a

2)c

3)a

4)c

5)b

hope this , if so, your appreciation would be signified through giving   me brainliest, and a you : ) have any further questions? feel   free to ask me in the questions box.