Answer:
1) Depiction of daily life
2) Religious rituals
Step-by-step explanation:
1) Depiction of daily life - the paintings just show what life was like to pass on experiences to descendants. This theory is possible due to the sequence that the paintings are in where various animals are shown being tracked and hunted (a large part of what they did back then)
2) Religious rituals - proposed by a priest named Henry Breuil who spent most of his adult life wandering and studying the caves, the paintings might have been done as a form of spirituality to increase hunting effectiveness. This seems viable due to the various religions that appeared aroundd the world based off of animal deities.