Hello! I don’t understand what opportunity cost means, can you explain it? Thank you :)!

Read the paragraph below and answer the question that follows. "andy was asked to speak in a school assembly about a fundraising opportunity for a fellow student who had recently been diagnosed with leukemia. andy's stomach hurt and his hands were cold. "steady man," he thought. "you can do this. it's for tim. he needs our ." andy could picture the students wanting to get involved. it occurred to him now that he wasn't just giving a speech. he had something worthwhile to say. which strategies did andy use to reduce his apprehension? select all that apply." be prepared. use muscle relaxation techniques. get experience. think positively. focus on communicating to the audience.

How is germany's location in europe an advantage during wwii?

Which of the following actions do the national response and recovery policies (national response framework, national infrastructure protection plan, national incident management system) not provide guidance on?