The correct answers are number 2) conflicts with American Indians over land use 4) the discovery of gold in the American River, and 5) the addition of Texas into the United States.
Three effects of Westward expansion were conflicts with American Indians over land use the discovery of gold in the American River and the addition of Texas into the United States.
The Manifested Destiny made the government of the United States expand settlements to the Western territories, displacing the Native American Indians that already lived there. The government wanted white people to settle in and work the lands to produce an income. Native American tribes were moved to Indian Reservations. Under the flag of "God mandated," "spread democracy," and "expansion of capitalism" through the Pacific West, the Westward expansion benefited some and affected others.
