Crepuscular mammals are active at dawn and dusk; which option best describes an example?

• A. Active during daylight hours.
• B. Active at night.
• C. Active at dawn and dusk.
• D. Active at all times.

Answer: (C)

Crepuscular activity means being active during twilight—around dawn and dusk—when light is low and conditions are often cooler. This timing helps many mammals forage while avoiding the heat of day and some daytime predators. The best choice describes animals that are active at dawn and dusk, which matches crepuscular behavior. The other options describe different patterns: being active during daylight hours is diurnal, active at night is nocturnal, and being active at all times isn’t specific to a twilight pattern. For context, creatures like rabbits and deer are commonly cited as crepuscular because their activity peaks during those twilight periods.