Answer:
Opportunity cost is when you have a choice between a number of things. The thing/things you didn't choose are the opportunity cost, if that makes any sense.
Explanation:
I learned this in fith grade science
Answer:
The Calvin cycle is also called the dark reactions or light-independent reactions because it's the part that doesn't need energy from the sun to happen. ... This is where plants make sugar molecules that they can use to make other essential components, and that all other organisms can use for energy.
Explanation:
A proper noun is just a specific noun and starts with a capital letter. Some suggestions: Honda Civic. McDonald's. (Your name). Texas. Grand Theft Auto. The Hunger Games. (Your teacher). Time Magazine. Red. Despicable Me. I hope this helps :)
I would say C. Good luck!
Answer:
the sentence is an object of a preposition. is that what you're trying to know?