In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 

To extend the shelf life of lettuce,
wrap it in paper towels before storing it in a bag.

Remove hair from bathroom drain.
Pour full 2 liter bottle of coke soda down bathroom drain.

To make a pretend knife for a cake, you can

Craft the knife out of fondant