________ sounds are used by fishermen to detect shoal of fish.

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Solution

Ultrasounds are used to find the depth of a sea using the principle of sonar.
The same principle is used by fishermen to detect the shoal of fish.
Hence, ultrasounds are used by fishermen to detect shoal of fish.

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________ sounds are used by fishermen to detect shoal of fish.

Ultrasounds are used to find the depth of a sea using the principle of sonar.The same principle is used by fishermen to detect the shoal of fish.Hence, ultrasounds are used by fishermen to detect shoal of fish.

Ultrasounds are used to find the depth of a sea using the principle of sonar.
The same principle is used by fishermen to detect the shoal of fish.
Hence, ultrasounds are used by fishermen to detect shoal of fish.