Question

review the details below.

• because of specialized salt glands on their tongues, some crocodiles are able to live in saltwater habitats, while others live in freshwater.
• scientists believe that the crocodilia order, which includes all modern crocodile species, has been around for about one hundred million years.
• crocodiles have flexible diets, but if nothing is available to eat, they can survive on stored food for a year.

choose the best topic sentence to introduce a paragraph containing these details.
although alligators and crocodiles are often confused, crocodiles have several attributes that distinguish them from alligators.
crocodiles have adaptations that may have contributed to these species ability to survive for millennia.
crocodiles have outlasted other animals because they can feed on a variety of foods or live without eating for a year.

Explanation:

The details mention salt glands (adaptation for habitat), long - existence (millennia), and survival without food (adaptation for food scarcity). The second option about adaptations contributing to survival for millennia ties these details together. The first option focuses on alligators vs. crocodiles (not in details). The third option only focuses on food (misses habitat and long - existence).

Answer:

Crocodiles have adaptations that may have contributed to these reptiles' ability to survive for millennia.