The correct answer is true.
It is true that the difference between the Declaration of Independence and the Constitution is the Declaration states goals or philosophy and the Constitution puts ideas into action.
The Declaration states the motives why the United States demanded independence from the British crown. It enumerates the reasons and grievances committed by the government of England. In the case of the Constitution, the delegated that met at the Constitutional Convention in the city of Philadephia, Pennsylvania, came up with the new form of government that the United States needed. So yes, they put ideas into action.