Option 1 states that both statements are individually true and that Statement II is the correct explanation of Statement I.

Statement I states that bats can catch their prey in the darkness of night. This is true as bats are nocturnal animals and have adaptations that allow them to navigate and hunt in the dark. They use echolocation, a process where they emit ultrasonic sounds and listen to the echoes that bounce back, to locate and catch their prey.

Statement II states that bats can produce and detect ultrasound. This is also true. Bats produce high-frequency ultrasonic sounds, which are above the range of human hearing, and they can detect the echoes of these sounds to navigate and locate their prey. This ability to produce and detect ultrasound is essential for their hunting and survival.

Therefore, Option 1 is correct because both statements are true, and Statement II provides the correct explanation for why bats can catch their prey in the darkness of night.