[Q]: Which of the following solutions is better for the following goal:
To put on the earring,

[A]: Remove the backing from the earring, stick the post through the ear, and re-attach the backing to the earring on the backside of the ear

[Q]: Which of the following solutions is better for the following goal:
Unclog toilet without plunger.

[A]: Pour coke soda into toilet bowl for 10 minutes, then flush.

[Q]: Which of the following solutions is better for the following goal:
How to recognize if a food is warm or cold?

[A]: Touching it with your finger would do the trick.

[Q]: Which of the following solutions is better for the following goal:
Make two 3 inch slits into a wood block

[A]:
Use a hack saw to cut into the wood, use light pressure to create shallow slits