Aperture #1

1. I would use a a wide aperture size to increase the light that is coming into the picture.
Also using a wider aperture size makes your main subject have more focus rather than the things surrounding it. Using the wide aperture tells you a lot too and makes your picture more interesting.

2. Using a smaller aperture size like f22, makes everything in your picture in focus and nothing is really blurred in it. It also lets in less light so then when waiting to shoot something natural I would use a smaller aperture size.

3. Using a wider f-size will get only your picture in focus so if wanting for everything to be in focus I would use a hight aperture size, if you use a smaller size moving a bit won't change a lot, or make your picture blurr.