What is call option?

What is call option? What is call option? what is the meaning of call option in chinese?and also 'put and call options' the American call option and the Euro call optionwhy the American put option is higher than the Euro put option,whereas the American call option is equal to the Euro call option what is option simle?关于经济学的 call option是什么意思 call option是什么意思 call me crazy,call me mad? what is the meaning? What letter is you call yourselfshichuzhongde Is This What You Call Love?歌词 what letter is yuou call yourself快 what letter is you call yourself? What is this______（call）in English? what the line of longitude is call? what the line of longitude is call? What is CALL?what is CALL?-Computer Assisted Language LearningHow can it help students to learn? 英语翻译Synthetic CallAn investment strategy that mimics the payoff of a call option.A synthetic call is created by purchasing the underlying asset,selling a bond and purchasing a put option.The strike price on the put option is equal to the face what is called和what we call意思一样吗?