Answer:
the answer is all of the above
Fossil fuels and green house gases which burn holes in the ozone layer of the atmosphere causing global warming
They do that so when a shark eats something and crumbs come out of its mouth it eats the crumbs
<span>True. A valid hypothesis must be testable and able to be verified or disputed empirically, because otherwise it is not a scientific hypothesis. A hypothesis that is not readily testable (for example, about a made up or fictional event) are not good hypotheses.</span>
