URL:https://static.vecteezy.com/system/resources/previews/018/776/144/original/primitive-man-on-knees-near-stones-for-first-time-breeds-bonfire-using-stick-and-friction-force-ancient-human-homo-sapiens-with-beard-dressed-in-skin-animal-learn-to-make-fire-flat-design-vector.jpg
掲載元:https://www.vecteezy.com/vector-art/18776144-primitive-man-on-knees-near-stones-for-first-time-breeds-bonfire-using-stick-and-friction-force-ancient-human-homo-sapiens-with-beard-dressed-in-skin-animal-learn-to-make-fire-flat-vector-design