This image reflects the American spirit during the era of Westward expansion. Thus the correct answer is D.
What was war?
War is referred to as a situation caused due to conflict between two countries unable to resolve their issues and involves a military intervention to seek the majority in the conflict.
Between the late 18th and the mid-19th century, the United States' westward expansion was continuous. Most of the Native Americans who had lived in those areas for thousands of years prior to the arrival of European colonists were driven out by this territorial shift.
American migration westward may have been influenced by the discovery of gold and mining prospects, faster rail travel to the West, and easier access to supplies because of the railroad.
Therefore, option D the era of Westward expansion is the appropriate answer.
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The image is attached-
