Bill, Tag, Label, Note
This tree has an umbrella, which it's holding over its head. Strange, because trees normally like water… Turns out, this tree wasn't getting showered in water, but in dollar bills instead.
The sick part is that all those bills were once this tree's friends. Picture the tree sobbing uncontrollably, as pieces of its former friends fall everywhere around it. No wonder it needs that umbrella.
さつ
ふだ
None
And the person who gave the tree an umbrella to protect it from all those bills? Satsuki (さつ), a little girl famous for… handing out umbrellas, I guess. Makes sense that Satsuki would take care of these bills then.
Try to remember this little girl named Satsuki, since she'll come up whenever the reading for a kanji is さつ (there's a good handful of them). Picture her in your mind, with details like her hair and clothes. Maybe even holding an umbrella or standing by a tree? You should also know she's kind of a bookworm, I guess, in terms of personality. If you can imagine her clearly now, it'll be easy to remember さつ kanji later on.