Respuesta :
After Mr. Bates passed away, Gulliver's business began to fail. Thus, he decided to go back to sea and work as a ship's surgeon. This is why he originally went to sea.
However, at the end of book 1, Gulliver accidentally meets a ship going back to England and decides to go back to his native country.
At the beginning of the book, we learn a little about Gulliver, and about his decision to travel. We learn that Gulliver was born to a family that is quite poor, and is therefore unable to keep him. Gulliver travels to London and becomes a surgeon's apprentice. He dreams of travelling, and this motivates him to become a surgeon aboard a ship called The Swallow for three years.
Hi motivation changes after he settles down. He establishes a business and gets married. However, his business in London begins to fail and his patron dies. He then goes to sea again and travels for another six years.