What is an example of opportunity cost, what is it’s effect on future?

opportunity cost is the loss of potential gain from other alternatives when one alternative is chosen

Explanation:

for example you spent time and money going to a movie you cannot spend that time at home reading a book and you can't spend the money on something else

I think that opportunity cost is not a bad thing considering the future it's actually a very good alternative when something doesn't go your way it's basically like a plan B so it will not have any negative effects on the future just positive giving you different ideas and approaches at anything

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b