which of Jeffersons objectives for the expedition of Lewis and Clark, is the best represented in the illustration force in the territories, native Americans from their land document in a safe route to the Pacific Ocean learning about the territories, native Americans, gaining knowledge of the regents geography.

The objective that is best represented in the illustration is "learning about the territories, native Americans, and gaining knowledge of the region's geography." This is evident because the illustration shows Lewis and Clark interacting with Native Americans, observing the land and its features, and potentially documenting their experiences.