Answer:
The sense of taste would help identify edible and non-edible types of food.
Step-by-step explanation:
In order to know if they had food that was edible, they would have had to experiment with the food they found. Through taste, they can differentiate if the taste of the food was good or not. For example a bitter food would probably be avoided as a food source and a sweet or savory food would be a potential new source of food