Final answer:
Quinoa and soybeans are two plant-based foods that supply all nine essential amino acids.
Step-by-step explanation:
Two plant-based foods that supply all nine essential amino acids are quinoa and soybeans.
Quinoa is a complete protein source, meaning it contains all nine essential amino acids. It is also high in fiber and rich in nutrients like magnesium and iron.
Soybeans are another plant-based food that provides all essential amino acids. They are commonly consumed in the form of tofu, soy milk, and edamame.