What does a sign with a picture of a deer indicate?

Answer: A — Wildlife crossing ahead.

A sign with a picture of a deer typically indicates that a wildlife crossing is ahead. This warning sign is intended to alert drivers to be cautious and reduce their speed in order to avoid collisions with animals. Option B (speed limit reduction ahead) may seem like it could also be a correct answer, but it is not specific enough to the type of animal and is more commonly indicated with a sign featuring a slow-moving vehicle. Option C (animal exhibition ahead) and option D (hunting allowed in the area) are incorrect because these signs would typically feature different images and also be accompanied by more specific information and additional signs.