Question

It was a dark cloudy night. Dhondiba, a farmer wanted to Visit his  field. His educated son was with him. He was a science teacher. Suddenly Dhodiba saw many bats were flying. He was astonished how those bats could see their way in the dark also. His son explained the reason. Can you explain the reason?

Answer 1

because they are the only mammal who can see at night too

Answer 2

because bats can only see in dim light or in dark.
their eyes don't allow much light to enter inside.