Concept:Foods from animal sources generally contain more protein than most plant-based foods. We compare the protein content per 100 g of each food.Explanation:Cheese is a dairy product and a rich source of animal protein. Hard cheeses like Cheddar provide about 25 g to 33 g of protein per 100 g. By comparison, mushroom contains about 3 g of protein per 100 g. Plantain provides only about 1.3 g of protein per 100 g. Yam provides about 1.5 g of protein per 100 g. Therefore, none of the plant-based options can match cheese in protein content.Answer:Option A (Cheese)