The Earth rotates on its axis, which results in a 24 hour cycle of day and night. The Earth also revolves around the Sun, which results in the changing of the seasons over the course of a year. The existence of days, years, and seasons demonstrates that most natural events A.
occur in patterns.
B.
can only be observed with microscopes.
C.
cannot be studied by science.
D.
are random and unpredictable.

d

Explanation:

fact. you're welcome.

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.  

they usually pass federal laws

and sometimes in the elections of the president