Question:
Goal: To create cold air in a DIY air conditioner made from a fan enclosed in a Styrofoam box.

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Put a bottle of frozen water in the box with the fan.

Question:
Goal: stop cats from digging in the garden

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
place something unpleasant to walk on like gravel around the area where you don't want cats

Question:
Goal: How can I make a cool ink stamp quickly?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Cut a pod of okra horizontally, dip in ink and stamp on paper for a cool design.