What are some theories about how the megaliths at stoneage in England were built

Here is a fact~Stonehenge is a massive stone monument located on a chalky plain north of the modern-day city of Salisbury, England. Research shows that the site has continuously evolved over a period of about 10,000 years. The structure that we call "Stonehenge" was built between roughly 5,000 and 4,000 years ago and that forms just one part of a larger, and highly complex, sacred landscape.

and theories 1. A place for burial 2. A place for healing 3. A soundscape 4. A celestial observatory 5. A team-building exercise