Answer:
Gilded Age refers to the period of prosperity and industrial boom after the Civil war up to the turn of the century.
Step-by-step explanation:
The improvement in technology and the exploitation of western land led to the overproduction of agricultural products. Farmers were getting low prices for their products and therefore produced even more which made the situation worst. The term Gilded Age was used to denote the ugly side of prosperity and technological advances during this time.
Native Americans were considered wild and brutish people and were forced to assimilate into the superior European culture. The case of immigrants was different because they migrated from Europe to the United States which have developed their own culture by now and therefore considered these immigrants lower in the hierarchy of citizens.