I dont think it would be possible for someone to listen to your calls im pretty sure only the police could if they provide a sign warrent by a judge to the phone company
Minimize any apps/webpages on it you have open (your background has to be visible), left click with the mouse, hit Personalize, and it should have Backgrounds on the page if you scroll down. You can hit Browse to look through your files on the desktop for what you want.
Answer:
The answer with explanation is attached in the file.
Explanation: