Go to "My Activity" option on the top of the page.
Click on "Edit my preferences" option.
Click on Blue button "Update Photo or Avatar".
Select the photo you want from the photo carousel or You can add or change a photo or an avatar.
Click on "Use Selected photo".
Click on 'Submit' when you are finished with the work.
shoot your computer
One can upload photos to a Yahoo account by going to their yahoo account and clicking on edit profile from there click on add photo and select the photo of choice. To ensure it goes smoothly make sure the pop up blocker is turned off.
Yahoo! wrote Yahoo! Answers.
Right click on the photo, save to your desktop, then upload as you would any other photo.
Yahoo answers questions
According to Yahoo Answers,you need to be 13 to become a member of Yahoo Answers.
No,you can't.Yahoo Answers is launched by yahoo,so hence,to create a yahoo answers account,you need to have a yahoo account.
No, wikianswers is not inferior to yahoo answers.
with mouse
You can ask or answer questions at yahoo answers at any age,but Yahoo Answers says that you need to be 13 to create a yahoo answers account,same for Facebook,Wiki Answers and many other sites.
No, you must sign up with Yahoo to be able to post or answer a question on Yahoo Answers.
You don't. Yahoo images is an image search engine that looks for images on the internet. Just upload a picture anywhere on the internet and Yahoo will eventually add it to it's image index.