Answer:
pretty sure it's aspect ratio
1.) 3 situations for depth of field would be to a garden, a field or meadow, and a tree.
2.) same thing as number 1
you should only stay home if you or a love one is sick or there is a family emergency.
They made music out of nature and the sounds of tree wood banging on another stick of tree wood. Thats how they did music in the past now its digitally.