Final answer:
Manifest Destiny intensified divisions between free and slaveholding states, contributing to sectionalism and setting the stage for the Civil War.
Step-by-step explanation:
One specific historical effect that resulted from the concept of Manifest Destiny between 1844 and 1890 was the exacerbation of tensions between free and slaveholding states. This process of expansion led to the inclusion of new territories that upset the fragile balance of power established by the Missouri Compromise. The inclusion of territories such as Texas and California, and the debate over whether they should be admitted as free or slave states, contributed significantly to the rising sectionalism that ultimately led to the Civil War.
The process depicted in the image is the concept of Manifest Destiny, which justified American expansion across the continental United States in the 1840s. This belief held that Americans were destined to spread democratic institutions across the continent from coast to coast. One specific historical effect of Manifest Destiny during the period from 1844 to 1890 was the acquisition of vast territories in the Southwest, including California, through the war with Mexico.