What is the 4th Amendment? (You may include your cite-source in your response)

Be sure to comment on 1 of your colleague’s posts (you may comment on more than 1 colleague).
1) What is the 4th Amendment? (You may include your cite-source in your response).
2) What are your thoughts about mass surveillance and its implications to 4th amendment rights?
I included screenshots of my peers post which I have to reply to/comment.