why did the children went to live with the professor

Peter, Susan, Edmund, and Lucy come to live with an old Professor in his home "in the heart of the country" during the war, since air raids are throwing London into a state of terror.

They went to live with the professer when they were being evacuated due to the air raids in London.

Peter, Susan, Edmund, and Lucy come to live with an old Professor in his home because to aviod air raids