Ключевые слова: 15, 1316, activity, adolescence, back, boy, caucasian, cheerful, company, competitive, energetic, enjoying, european, excitement, exercising, female, field, fitness, four, friends, friendship, girl, grass, group, happy, jogging, jumping, laugh, leisure, lifestyle, male, outdoors, park, playful, playing, positive, recreational, relaxing, running, smiling, sport, summer, team, teenagers, together, vacation, young,