Question

the fisherman has been catching fish​

Answer 1

the fisherman has been catching fish to support his family because he was very poor

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Answer 2

Answer:

There are models that emit ultrasound waves in all directions, and those that emit ultrasound waves in only one direction, but sweep in a circle. In other words, fishermen search for only the types of fish that they want, and they determine where to find them by using various fish detector functions