Causes......food is the wrong colour, size or shape.
...food is in the wrong place.
...food item (cracker or cookie) is broken.
...food item (cracker or cookie) was whole, but after taking a bite out of it, it's not anymore, so give me a new one... what... I can't believe you're going to deny me the chance to take just one bite out of every whole cracker in the box!
...lots of issues from clothes that are the wrong colour, size, style, etc. DD once wore a purple flannel nightgown for 48 hours straight (in the summer) because it was the only thing that matched her beloved purple crocs.
...and the craziest one ever, we asked older DD if younger DD was asleep, older DD says that sibling is still awake, younger DD, feeling a little tired and cranky, proceeds to have a massive screaming and kicking fit, shouting, "I'm not awake, I'm asleep." DH nearly drove off the road.