Lord dragon you are wrong.
The answer is A: Incandescent light bulbs are almost 100 percent efficient. Because b-d do not make any sense.
Between atoms (one metall and one non metall) form an ionic bond(NaCl)
The answer is b because if you’re fan is blowing and you spend it the opposite way, the air will be cooler
Well people say the world's going to end soon so people need to find another planet to live on they're thinking about Mars at the moment