I really need help on finding what literary techniques are in this passage

The woods were at the top of the hill that rose behind Hailsham House. All we could see really was a dark fringe of trees, but I certainly wasn't the only one of my age to feel their presence day and night. When it got bad, it was like they cast a shadow over the whole of Hailsham; all you had to do was turn your head or move towards a window and there they'd be, looming in the distance. Safest was the front of the main house, because you couldn't see them from any of the windows. Even so, you never really got away from them.

There were all kinds of horrible stories about the woods. Once, not so long before we all got to Hailsham, a boy had had a big row with his friends and run off beyond the Hailsham boundaries. His body had been found two days later, up in those woods, tied to a tree with the hands and feet chopped off. Another rumour had it that a girl's ghost wandered through those trees. She'd been a Hailsham student until one day she'd climbed over a fence just to see what it was like outside. This was a long time before us, when the guardians were much stricter, cruel even, and when she tried to get back in, she wasn't allowed. She kept hanging around outside the fences, pleading to be let back in, but no one let her. Eventually, she'd gone off somewhere out there, something had happened and she'd died. But her ghost was always wandering about the woods, gazing over Hailsham, pining to be let back in.

The guardians always insisted these stories were nonsense. But then the older students would tell us that was exactly what the guardians had told them when they were younger, and that we'd be told the ghastly truth soon enough, just as they were.

The woods played on our imaginations the most after dark, in our dorms as we were trying to fall asleep. You almost thought then you could hear the wind rustling the branches, and talking about it seemed to only make things worse. I remember one night, when we were furious with Marge K.–she'd done something really embarrassing to us during the day–we chose to punish her by hauling her out of bed, holding her face against the window pane and ordering her to look up at the woods. At first she kept her eyes screwed shut, but we twisted her arms and forced open her eyelids until she saw the distant outline against the moonlit sky, and that was enough to ensure for her a sobbing night of terror.

Please help I am really bad at literary techniques and i really need help!

Thank you so much! this really means a lot to me.