[Q]: Which of the following solutions is better for the following goal:
To make your own free mulch.

[A]: Soak and shred news papers. Mix in with potting mix and spread at the base of plants and shrubs to mulch.

[Q]: Which of the following solutions is better for the following goal:
How do you protect food in the wild?

[A]: Climb up a tree and hang it as high as you can safely.

[Q]: Which of the following solutions is better for the following goal:
What is a safe blade to use in a decorative guillotine?

[A]: A plastic or wood blade would be safe.

[Q]: Which of the following solutions is better for the following goal:
How to make a page-holder protruding outside the book, without using any other materials?

[A]:
Tear the top corner of the page a little bit and place it so that it sticks outside the book when closed.