The correct option is B.
Stars live out most of their lives at MAIN SEQUENCE. Stars generally are divided into three major stages, these are:
1. Pro stars and pre-main sequence star
2. Main sequence and giant star
3. Variable stars
Major stages in the life of a star can last for millions of years.
Answer:
la tercera caja (3rd box)
Explanation:
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Valence electrons determine its valency ? (The group, as in its oxidation state and stability)
