Which of che following molts its exoskeleton, allowing it to grow larger!
a. che blue crab
b. che bar sea scar
c. che scallop
d. the sea urchin
e. the Venus clam

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

"it built up in the atmosphere"

i think thats it, idk, i tried looking for this exact q& a for grad. and idk if i got this question right or sorry if im wrong