This is an ant path. While moving, ants leave a pheromone trace behind. Other ants will follow this trace. The more ants that walk this path, the bigger the concentration of pheromones that is there. Meaning that even more insects will use this path. Thus, soon this path becomes visible to people.
This cat has sharpened its claws against this piece of wood for 14 years.
This is an entrance to the army canteen. Before entering, soldiers clean their boots from snow against the bar below. That’s why that snow pile is there.
The dog that belongs to the author of this photo regularly does its deeds on this part of the lawn.
The girl is hoola-hooping.
2 kids were walking: a younger boy to the left and an older girl to the right. The boy fell, so the girl picked him up and carried him in her arms.