what do you need help with :)
Answer:
opportunity costs are the alternative choice in which you could make when making a financial decision while a trade-off is something that you could switch out in order to make a different decision
A scientific theory is when a theory is tested, well-substantiated, unifying explanation for a set of verified, proven factors. A theory is always backed up with evidence. A hypothesis is only a suggested outcome and it's testable and falsifiable.
Hope this is what you wanted ^.^
But I feel like I didn't