Final answer:
The correct statement about Washington's relations with the Native Americans is that he made treaties and had respect for Native Americans but promoted their assimilation into European-American culture.
Step-by-step explanation:
The statement about Washington's relations with the Native Americans that is true is: 4 - Washington made treaties and had a mutual respect with many Native Americans, but he also encouraged their assimilation. Moreover, during Washington's presidency, numerous treaties were made between the U.S. government and various Native American tribal nations. These treaties often resulted in a loss of indigenous lands but were part of a broader federal policy including encouraging the 'civilization' of Native Americans and assimilating them into the European-American way of life. Washington's administration, through actions like the Treaty of Greenville, forced the relinquishing of Native claims to lands in Ohio after defeat in battle. However, despite these treaties, the sovereignty of Native American tribes was not fully respected until much later, and it was not until 1924 that all Native Americans were granted U.S. citizenship.