Bats can ascertain distances, directions, nature and size of the obstacle without any eye, explain how ?

Explanation

### Step-by-Step Solution:

1. **Understanding Echolocation**: Bats use a biological sonar system known as echolocation to navigate and hunt in the dark. This system allows them to perceive their environment without relying on eyesight.

2. **Emission of Ultrasonic Waves**: Bats emit high-frequency sound waves, known as ultrasonic waves. These waves are beyond the range of human hearing, typically above 20 kHz.

3. **Interaction with Obstacles**: When these ultrasonic waves encounter an object (like an obstacle or prey), they bounce back or reflect off the surface of the object.

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