Final answer:
The Nez Perce tribe helped the Lewis and Clark expedition by providing geographic knowledge, acting as guides and translators, and offering resources and support.
Step-by-step explanation:
The Nez Perce tribe played a significant role in the Lewis and Clark expedition. They assisted the expedition by providing valuable information about the geography of the region, acting as guides and translators, and offering their assistance in navigating through difficult terrains and establishing relationships with other tribes.
One of the key figures in the Nez Perce tribe who helped the expedition was a Shoshone woman named Sacagawea. She served as an interpreter and mediator during interactions with other Native American tribes, and her presence played a crucial role in establishing peaceful relationships with these tribes.
The Nez Perce also provided vital resources and support to the expedition, such as food, shelter, and horses, which allowed Lewis and Clark to travel long distances and explore new territories.