Read the passage below.Did you know that crocodiles tend to have longer, pointed, V-shaped snouts while alligators generally have wider, rounder, U-shaped snouts?

The word “while” contrasts the two animals’ snout shapes: crocodiles have pointed, V-shaped snouts, whereas alligators have rounder, U-shaped snouts. This signals a difference between alligators and crocodiles, so the correct choice is “It signals a difference between alligators and crocodiles.”

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