Pose

This is definately a posed picture, because the two girls are aware of the photographer, and are in a particular stance for the picture.

Candid

This picture is a candid picture, because the boy is not aware the picture is being taken. Also because this picture was taken in motion.

Group

This is a group photo because as you can see there is a group of people sitting in a circle. Although, this could also be a candid picture because the people are not aware of the photographer and are in motion.