The three correct answers regarding the relationship between nebulae and stars are:
- Stars explode to form nebulae.
- Stars form from nebulae.
- Nebulae form from stars.
These statements reflect the life cycle of stars and nebulae in the universe. Nebulae can serve as the birthplaces of new stars, while the death of stars (especially massive ones) can lead to the formation of new nebulae from the expelled material.