Final answer:
The first paintings that were considered a form of human expression can be traced back to images daubed on cave walls. Artists used charcoal, ochre, and other natural pigments to create diverse and representational art. They applied the paint using techniques such as patting, dabbing, and spraying.
Step-by-step explanation:
The first paintings that were considered a form of human expression can be traced back to images daubed on cave walls. During the Paleolithic era, humans created diverse and representational art, including paintings on cave walls. These paintings were made using charcoal, ochre, and other natural pigments, and artists used various techniques such as patting, dabbing, and spraying the paint onto the walls.