Answer: A. Cave-painting
Cave painting is one of the earliest landmarks of the Paleolithic era. Cave painting is generally of prehistoric origin and is known to be roughly 44,000 years old. Paleolithic art, also known as ice-age art, is regarded as the oldest form of prehistoric art and is known to be predominantly cave painting. The popularity of cave painting during this era is as a result of its simplicity as it doesn’t involve any special talent or special tools. Stones, woods, and even fingers were used to draw on walls in caves.