Goal and options: What acid do you add to heated milk to make mozzarella cheese?
output answer: Add citric acid, lowering the pH of the milk.

Goal and options: What is a good substitute for DIY cat food when your cat food cupboard is bare?
output answer: Two options come to mind. One, take kitty outside to a natural setting where she might chase down a meal to remember, or keep a cheap tin of tuna around for these emergencies. Either one will likely be a hit with kitty.

Goal and options: umbrella stand
output answer:
can be used to store wet umbrellas during stormy weather