Answer:
equilibrium price and quantity of diary milk will increase
Step-by-step explanation:
A substitute good is a good that can be used in place of another good.
If the price of nut based milk, a substitute for diary milk increases, nut based milk becomes more expensive for consumers and as a result consumers would increase their demand for diary milk. This would lead to an outward shift of the demand curve and as a result, equilibrium price and quantity of diary milk will increase
Please check the attached image for a graphical representation