A beautiful group shot, Alina. The most effective group shots create a bonding effect by showing something that everyone in the image shares in common. You must answer the simple question: what makes a group a group? You do it very well here with complementary body language and the pink tops. Two of the girls look like right into the camera, but Justyna seems a bit reticent, which, of course is typical of the age. The tree brings a nice counter texture to the shot, creating a time contrast. The girls are young, their skin smooth and clear. The tree, meanwhile is old, rough and worn. The pairing of old and young embraces all of life itself. Congratulations -- you are a very talented photographer.