I believe the correct term to fill in the blank would be rumination. Trey is engaging in a practice of rumination. It is a deep or focused thinking of one that has undergone distress. It is analogous with depression and anxiety. When one is ruminating, he keeps thinking of a certain thought repetitively without thinking of any solutions to that problem.
I dont understand this, but different places? Helps you explore i guess?
They kept records and the migrations of people who fled and told what they knew
I’m pretty sure is A.causing deforestation