this photo is a candid since the model is obviously laughing at something, she isn’t too dressed up but looks like shes in more casual clothing to hang out in.
this photo was taken in a much warmer lighting than the others but it makes the other colors of her shirt and the flowers in the background blend together better, it also gives off a more calming vibe since she looks calm and happy while the lighting isn’t so harsh and bright.
in this photo the model looks like she took the time out of her day to actually put together a very neat and dressy appearance since her outfit matches with her accessories like the flowers in her hair and her sandals. This could also be considered a candid photo since shes taking pictures of another person or object.