The answer is letter c. Postmodern.
postmodern works are often playful in spirit, a reaction against the unrelenting seriousness of much modernist art. Postmodern is an art the ironically and playful treat objects.
Natural , without artificiality
It's the Neolithic period in which we see in technology and settled life. It began 10,200 BC. Neolithic is also considered as the last part of the stone age. This period started some of the inventions like bracelet, etc.
