The correct answer is C. Bats produce ultrasonic waves.
Bats use echolocation to navigate and find food in the dark. They emit high-pitched sounds that bounce off of objects and return to the bat, allowing them to create a mental map of their surroundings. This ability is essential for bats, as many species are nocturnal and would be unable to survive without it.
A. Bats do have strong wings, but this is not the primary reason why they can fly in the dark. Many other animals have strong wings, but they are not able to fly in the dark without the aid of echolocation.
B. Bats do not have sharp eyes. In fact, many species of bats are blind. This is because they do not need their eyes to navigate in the dark, as they rely on echolocation instead.
D. Bats are nocturnal, meaning that they are active at night. However, this is not the reason why they can fly in the dark. Many other nocturnal animals are not able to fly in the dark without the aid of echolocation.