"The power is back." OR "The electricity is back."

My dear and respected teachers

1: “Add the game feature to Yahoo! so that users may play games with each other.” ? OR…

“Add the game option to Yahoo! so that users may play games with each other.” ? OR…

Add the game facility to Yahoo! so that users may play games with each other." ?

2: “The power is back.” OR “The electricity is back.” OR “The light is back.”

3: I often play snooker.How should I say the following sentence?

“Try putting pink ball in the pocket .” OR “Try putting pink ball into the pocket.” ?

4: “Take all bones out of the fish before you eat it.” correct?

Thanks in advance!

Yes. You could also use the verb ‘pick’, but it’s not necessarily any better.