Look into the company, quality, and reviews of other customers of the appliance(s) you are looking at buying.
You need to be a little bit more specific
Answer:
D. movement
Movement is one of the principles of the design and it is used to guide the observer’s view over the art piece.
Answer:
Please go to the emergency room if your being serious
Lol, take it from a dude whose main username is White Shadow, and loves riddles
The answer is Shadow
It only appears where there is light, but if light has direct contact with it, such as a flashlight beam, it'll fade.