B I hope it’s right I don’t really help a lot but yeah lol
Answer:
is a well-sustantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.such fact- supported theories are not "guesses" but reliable accounts of the real worlds.
The answer is b because if you’re fan is blowing and you spend it the opposite way, the air will be cooler
