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. 

[EX Q]: What's the best material for a DIY walking stick?
[EX A]: A discarded tree branch.

[EX Q]: Use the sun and a magnifying glass to start a fire.
[EX A]: On a sunny day, hold the glass above something that will burn easily.  Use a dry leaf of a piece of paper.  Move the glass so the suns rays focus on the paper.

[EX Q]: What do you need to construct a miniature BBQ grill?
[EX A]:
A miniature BBQ grill can be constructed with two large food cans, a saw to make a few careful cuts, some screws, a thick mesh screen, and a set of hinges.