Art History - Pre-Historical findings and theories

For both Cave Paintings findings and Stonehenge, answer:

What are the theories that explain each one's role/function?

For each, write few theories.

Discuss what findings support the theories (connect the findings with the theory), and is it conclusive or rejected over time. If rejected - why?

Attachment:

My viewpoint of  "Cave of forgotten dreams"  and The Secrets of Stonehenge by National Geographic.

Link:

 "Cave of forgotten dreams" 

https://www.youtube.com/watch?v=zvpQBbW7P8E

The Secrets of Stonehenge by National Geographic.

https://www.youtube.com/watch?v=3sOyARR93hU (Links to an external site

If you dont have time to watch it all, you can skip a short part and watch from the beginning to 37:50min. and than from 50:00min. till the end.

Textbook:

Art across Time part 1, 4th edition