Read the following extract carefully and answer the questions given below:
It had happened when I was ten or eleven years old. I had decided to learn to swim. There was a pool at the Y.M.C.A. in Yakima that offered exactly the opportunity. The Yakima river was treacherous. Mother continually warned against it, and kept fresh in my mind the details of each drowning in the river. But the Y.M.C.A. pool was safe. It was only two or three feet deep at the shallow end; and while it was nine feet deep at the other, the drop was gradual. I got a pair of water wings and went to the pool. I hated to walk naked into it and show my skinny legs. But I subdued my pride and did it.