Over exaggerated
In the context of this passage, which is talking about how Facebook is attempting to cut down on incorrect, fake, or 'sensationalized' news, the word clearly means news that is not true or over exaggerated in a way that makes it 'click bait'-something that isn't clear, objective content.
Measles,lung cancer,and air pollution
Your family is a dependent clause as well as Venice. :)
It means the speakers mother has passed away
I hope this help : )
