All stars have certain stages in common in their life cycles. The primary stages include:
- Nebula - The star begins its life in a nebula, a cloud of gas and dust.
- Protostar - As gravity pulls the materials together, they form a protostar.
- Main Sequence - This is a stable period where the star fuses hydrogen into helium.
After these stages, stars can evolve into different paths that may include becoming a red giant, supernova, and ending as a white dwarf, neutron star, or black hole, depending on their mass.
Given the options you've provided, the stages that all stars have in common in their life cycles are:
- Nebula
- Protostar
The other options (white dwarf and black hole) apply only to specific types of stars based on their mass and evolutionary path.
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