"계절별" refers to the concept of categorizing or organizing things according to the four distinct seasons: 봄 (spring), 여름 (summer), 가을 (autumn), and 겨울 (winter). Each season has unique characteristics, such as temperature changes, weather patterns, and natural phenomena. This classification helps in understanding how different aspects of life, like fashion, food, and activities, vary throughout the year. In many cultures, seasonal changes influence traditions and celebrations. For example, 추석 (Chuseok) in 가을 celebrates the harvest, while 설날 (Lunar New Year) in 겨울 marks the beginning of a new year. Understanding "계절별" allows people to appreciate the beauty and diversity of nature across different times of the year.