What is CALL?

What is call option? what letter is you call yourself? what letter is yuou call yourself 1.Lucy,what is “a _______telephone call”? Is This What You Call Love?歌词 What letter is you call yourself What is this______（call）in English? What leller is you call yourself what is called和what we call意思一样吗? Call it what you will,it is still a problem. what is she called?在这call为什么加ed what is the meaning of "call option " in chinese?