How do I comment or add to a previously asked question?

[Amane]

There are 4 ways,to be exact:

-->Email the user(s) you want to respond to(only possible if both you and that user Emailing options are enabled).

-->IM the user(s) you want to respond to(only possible if both of you and that user IM options are enabled).

Provided that they allow their Emailing options.To enable this:

-->Go to your"My Activity"
-->click"Edit My Preferences"
-->click"Privacy & Communications"
-->Tick this/these box/es next to

"The Answers Community can contact me:

(box should be here)Via Email (Your address will remain private)
(box should be here)Via Yahoo! Messenger (This will make your messenger and Yahoo! ID visible to the Answers community)"

-->click"Submit" to save your setting.

Go to their profile and if you find there are 1 or 2 enabled emailing options,then you can send message(s) to them

something like this:

"IM (ID)"
"Email (username)"

-->When you choose a Best Answer,you can give a feedback about their answer/comment.(You need at least 60 minutes/1 hour to choose a Best Answer)

-->Via"Additional Details.However,this one is risky as it can turn your innocent question(s) into a chat question(s)/forum(s) and have higher chance of getting reported.The chance become much higher if you put sarcastic remark(s) and insult(s) to other user(s).

Take care.