They were beckoning to him calling shrilly. hy did the seagull’s father and mother threaten him and cajole him to fly?

Explanation

The young seagull was afraid to fly. Even when it saw its brothers and sisters flying, and its parents helping and teaching them, it could not gather enough courage to make that first flight. That is why its father and mother were calling to it shrilly and scolding it. They threatened to let it starve on its ledge if it did not fly. They did so because they wanted it to leave its fear behind and learn to fly.