Question

bats cry out and listen to the echoes. this helps them know where to fly. this is called
a vision
b sonar
c colonies
d negligence

Explanation:

Bats use echolocation, which is similar to sonar. They emit sounds and listen to the echoes to navigate and find prey. Vision is related to sight, colonies refer to groups of bats, and negligence is unrelated. Sonar is the correct term for this echo - based navigation.

Answer:

B. sonar