Sit
Seat
There are two people under a canopy on the dirt. What are they doing? It's a thing called sitting. They're using the dirt as a seat for their butts.
ざ
すわ
None
You shake your head. People can't just sit on dirt, you think to yourself. There must be a wizard (ざ) around here trying to trick you. You certainly aren't going to be tricked into taking a seat by this wizard.