OK so basically you use a compound light microscope to observe specimen so if you were trying to find micro organisms that would be the one to choose.
I'm not sure if I understand your question correctly but we food is something that will not always be there for us but it is something that we need and we crave. Food is useful in many ways and helpful. We need love because due to lonliness many have died by commiting suicide.
12 months. You have to have it for 1 year without ant traffic convictions before you receive an intermediate license