Your professors uses Turn It In to determine how much of your paper is original and/or plagiarised. In this case 56% of the paper is copied. You can see on the right where the text originates.

LSE Learning technology and Innovation. (n.d.) How to interpret the Turnitin originality report: Guidance for students [Video]. You Tube. https://www.youtube.com/watch?v=6bjnVRVIdJA&t=128s