Answer:
Distracting backgrounds, moose antlers etc
Step-by-step explanation:
When taking photos having a very colorful background can be very distracting. It takes ones eye off of the vocal point. Another common problem is a term called "moose antlers". It's when something from the background looks like it's part of your head or hair etc. Like a branch in the background may look like bunny ears etc.
Having clear, non distracting, backgrounds is the way to go :)
Hope this helped.