Can i change my profile pic on yahoo answers?!?

Not to my knowledge. I have tried, asked a question on how to do it, but the instructions never result in success. I think that is gone with the green Y!A days.

You can't. Avatars and the editing of nicknames have been disabled. They are making changes to profiles. No one knows when or if they will be enabled again

Yahoo is in process of changing the profile page,
changing over to account page, and they decided to put nickname posting and picture
posting on hold for now. Not sure when it will be allowed again, if ever.

https://yahoo.uservoice.com/forums/219007-us-membership-desktop/suggestions/7144519-how-do-you-change-your-picture?tracking_code=99a33dab4ca0d61f7221d7619a8f4e32

You can't. Here is what Yahoo said almost a year ago regarding it...

Updates to Yahoo Profile
What's changing?

Yahoo Profile (profile.yahoo.com) is going away.

But don't worry - your profile picture, nickname, Facebook and Twitter connections, and comments on various Yahoo properties aren’t disappearing! We plan to move relevant settings like your profile pic, nickname, birthday, gender, and connected accounts (Facebook and Twitter) to your account settings.

We're simply removing the ability to view public profiles and the “about me” and “my interests” sections.
Why?

Yahoo Profile was created to let you view public info about others. With Yahoo, you could check out profile pictures, nicknames, and comment histories as well as manage your own publically visible settings. It never quite took off. Very few people look at other people's public profiles, so we're focusing on the things that matter to you by discontinuing unused features.

yahoo has disable this feature and for some reason, has not re-enabled it again.

Not any more for some weird reason. Sorry. It sucks I know. I joined after that stopped too.

No yahoo stopped that a year ago.

Yahoo stopped letting posters change nickname and avatars or pictures on accounts back in January 2015. No word on when we can change them again from Yahoo staff.

https://help.yahoo.com/kb/SLN25611.html?impressions=true

Currently Yahoo disables profile picture's change for unspecific amount of time.