Why do you think ancient people created cave paintings

There are many theories and hypothesis on this subject, none of them is definite though...

Here are 2 of the most interesting reasons:

Some archeologist said cave paintings were part of a ritual. Ceremonies were conducted in the caves and the artwork was the result  of a tribe’s mystics documenting their spiritual journey. There was one other that explained that many paintings were done by children and that it could symbolize their coming of age.Another approach ( more realistic one) explained that climate was changing and many species were dissapearing. So, the inhabitants of that time, left a record on the cave so as to remember the animals and their footprints when or if they return, so they can differentiate them when hunting.

What research did you learn from?