Which phenomenon is used to detect prey, predators or obstacles?

The phenomenon used to detect prey, predators, or obstacles is; option [B] Formation of pulses. Echolocation, utilized by animals such as bats, dolphins, and some species of whales, involves emitting high-frequency sound pulses and interpreting the echoes that bounce back from objects in their environment. By analyzing the time it takes for the echoes to return and the intensity of the returning signals, these animals can accurately determine the location, size, and texture of nearby objects, aiding in navigation, hunting, and avoiding obstacles.

This biological adaptation relies on the formation of pulses of sound and the interpretation of the echoes received, highlighting the sophisticated sensory abilities of these species. Echolocation is not only crucial for survival but also serves as a model for technological applications in sonar and medical imaging, demonstrating its significance in both biological and engineering contexts. Thus, the correct answer is [B] Formation of pulses.