Introduction to the Articles of Confederation:

To all to whom these Presents shall come, we the undersigned Delegates of the States affixed to our Names send greeting.
Articles of Confederation and perpetual Union between the states of New Hampshire, Massachusetts-bay Rhode Island and Providence Plantations, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, North Carolina, South Carolina and Georgia.

Preamble to the U.S. Constitution:

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.

Which reason best describes why the Founding Fathers felt it necessary to change the wording in the opening to the Preamble to the Constitution?

to ask other nations to accept us as a new country
to clarify the meaning and significance of the document that establishes the government
to discuss the powers of the president of the United States and the executive branch of the government
to explain the reasons we broke away from Great Britain

The reason that best describes why the Founding Fathers felt it necessary to change the wording in the opening to the Preamble to the Constitution is to clarify the meaning and significance of the document that establishes the government.