Final answer:
Imperialism is the policy of a powerful nation extending its control over other countries or regions, while manifest destiny is the belief in the expansion of territory across the United States. Valuable materials like minerals, oil, and agricultural products are associated with manifest destiny.
Step-by-step explanation:
The term that refers to a policy where a powerful nation extends its control over other countries or regions is imperialism. Imperialism involves the domination and exploitation of weaker territories for political, economic, and military gain.
The term that relates to valuable materials like minerals, oil, and agricultural products is manifest destiny. Manifest destiny was a belief held by Americans in the 19th century that the United States was destined to expand its territory from coast to coast.
Learn more about Imperialism and Manifest Destiny