Figured everything out properly except the trees. Now I did figure out the answer, but by metagaming it (figuring out the sixth question gave me everything I needed to google the right word). What was supposed to be the intended way to solve the trees?
I just added the hints and solutions I’d been putting off for a while, hopefully that helps. Here’s an answer to your specific question, too.
Click here for the answer
You solve the trees by connecting them like a dot-to-dot puzzle. Each row of trees indicates the order you should travel between them to trace out a letter in the 3x3 grid.