Grandpa spots as Alex is removing his shoes to wade across to the island.

• A. An alligator
• B. A snake
• C. A turtle
• D. A shark

Answer: (A)

The scenario hinges on understanding what kind of animal is most likely to be encountered at the edge of shallow water when someone is about to wade toward an island. Alligators dwell in freshwater habitats like swamps, rivers, and lake edges, where you’d plausibly be wading. They often lie camouflaged along the shore, so if Grandpa spots something as Alex is preparing to step into the water, an alligator is the most fitting and believable warning sign. The other animals don’t fit the moment as neatly: a snake could be present, but it’s less likely to be the immediate, dramatic find right at the water’s edge; a turtle is slow and less likely to threaten or alarm someone in that instant; a shark belongs to saltwater ocean environments and wouldn’t typically be near a shore where someone is wading to an island.