Final answer:
Sacagawea acted as a translator and guide for the Corps of Discovery.
Step-by-step explanation:
Sacagawea's role in the Corps of Discovery was that she acted as a translator and guide. As a member of the Shoshone tribe, she was able to communicate with other Native American tribes encountered during the expedition, as well as assist with finding food and other resources. Her knowledge of the land and its native plants and animals also proved invaluable.
Learn more about Sacagawea's role in the Corps of Discovery