Lewis and Clark are linked to the exploration of

Expedition, (1804–06), U.S. military

Explanation:

Lewis and Clark Expedition, (1804–06), U.S. military expedition, led by Capt. Meriwether Lewis and Lieut. William Clark, to explore the Louisiana Purchase and the Pacific Northwest. The expedition was a major chapter in the history of American exploration.

The Louisiana Territory

Explanation:

answer; regard the action of other people negatively;

answer; preconventional;