Washington is expressing his view that all good things that come to men should be earned by their efforts. By '<em>struggle</em>' he means through constant work and development that will be faced in trying to make the future easier for those who will come after us. If things are easier for others as a result of our work, then those privileges are rewarding, but if those privileges are given to some through '<em>artificial forcing'</em> or a system of made up comforts for royals or heads of state who claim to own them as a divine gift, then there is no progress or enjoyment, only privileges reserved for the few.
4. Native Americans were forced out by competition for resources and hunger.
Explanation:
Andrew Jackson made an act "Removal Act" forcing Native Americans to move to another land, causing Trail Of Tears. Many had died by starvation and no warmth through the way. Americans wanted resources like gold, found in the Native American.