[Q]: Which of the following solutions is better for the following goal:
how do you use a tanning bed?

[A]: get naked, or at least down to a bikini, and lay in the bed, and close the lid almost all the way.

[Q]: Which of the following solutions is better for the following goal:
How to sharpen a knife with a sharpening rod?

[A]: Hold the sharpening rod with your weaker hand and stroke the knife away from yourself with your dominant hand, alternating the sides of the blade

[Q]: Which of the following solutions is better for the following goal:
tack

[A]: can be used to hang dish towel on the wall

[Q]: Which of the following solutions is better for the following goal:
Should I leave fallen fruits on the ground as these help add organic beneficial materials to the soil?

[A]:
If you leave fallen fruits on the ground this invites parasitic cohabitation with unwanted pests. Be sure to clear up and remove fallen fruits to avoid over-invasion by pests.