Final answer:
The shop can efficiently produce 4 gallons of strawberry ice cream.
Step-by-step explanation:
To find out how many gallons of strawberry ice cream the shop can efficiently produce, we need to compare the amount of cocoa needed for chocolate ice cream with the amount of cocoa available. Since the shop has enough cocoa to make 4 gallons of chocolate ice cream, that means they can efficiently produce 4 gallons of any flavor that requires the same amount of cocoa. Therefore, the shop can efficiently produce 4 gallons of strawberry ice cream.