Final answer:
The alliance between Ousamequin’s people and the Pilgrims benefited both groups. The Pilgrims received protection, while Ousamequin's people gained access to advanced farming techniques.
Step-by-step explanation:
The alliance between Ousamequin’s people and the Pilgrims benefited both groups in several ways. Firstly, the Pilgrims received protection from Ousamequin's people, which helped ensure their safety and security in the unfamiliar land. Additionally, Ousamequin's people gained access to advanced farming techniques from the Pilgrims, such as using local herring to fertilize the soil, which improved their agricultural practices and crop yields.