A shark and a dolphin have similarly shaped bodies and fins. However, these two organisms are not closely related: The shark is a fish, and the dolphin is a mammal. Some species may have similar body structures even if they are not related because they evolved in:.
a) similar environments and specific traits increased their chances of survival
b) similar environments and were exposed to factors that caused exactly the same mutations
c) different environments, but tried to adapt in the same ways so they could survive
d) different environments, but ate similar foods that affected their growth and development