The three correct answers regarding the relationship between nebulae and stars are:
- Stars form from nebulae.
- Stars explode to form nebulae.
- Nebulae form from stars.
These statements accurately reflect the processes of stellar formation and evolution, where stars are born from the gas and dust in nebulae, and when stars end their life cycles (especially massive stars), they can explode in supernovae, contributing to the formation of nebulae.