Why does Grandpa believe the gator he sees is dead?

• A. It's on its back
• B. It's floating upside down
• C. It's missing its tail
• D. It shows no movement for minutes

Answer: (A)

When something dies, muscle tone relaxes and buoyancy can make the body float in a distinct way. For alligators, a dead individual often drifts to the surface and settles on its back, with the belly facing upward. That posture is a clear, immediate cue Grandpa uses because a living alligator isn’t usually found lying still on its back for long—it's more likely to be alert, moving, or oriented in a natural swimming position.

The other signs are less reliable: simply not moving for a few minutes could happen if the gator is resting, and a missing tail isn’t a definitive indicator of death. Floating upside down isn’t the typical dead-state for alligators as a common, readily observable rule. So the sight of the gator lying on its back best fits the expected sign of death in this context.