Answer:
Someone wants to have smoke in the air at a laser show because It's the dust particles or mist droplets which reflect the light of the laser. When you see a laser beam, what you are seeing is the beam being scattered by various small particles suspended in the air. ... When people want to show off laser beams, they often add smoke or equivalent to the air.
A because yeast do alcholic fermatation in bread when you bake and some bacterias prokayotes live off it.
I think it'd be cell, tissue, organ, organ system, organism.
I hope this helps!
The answer would be the first one
