Why Is It That the Majority of Stars in the Sky

question 173

Multiple Choice

Why is it that the majority of stars in the sky are in the main-sequence phase of their lives?

• A) Most stars die at the end of the main-sequence phase.
• B) The main-sequence phase is the longest-lasting phase in each star's life.
• C) The main-sequence phase is the only phase that is common to all stars.
• D) Most stars in the sky were created at about the same time, so these are all in the same phase of their lives.

---

Definitions:

Non-Disease Genes

Genes that do not directly cause diseases but may influence an individual's risk factors or traits that are not considered pathological.

Reproductive Decisions

Choices and judgements made by individuals or couples regarding childbirth, the use of reproductive technologies, and other matters concerning reproduction.

Moral Obligation

A duty or commitment to act in ways considered ethical and right, often irrespective of legal obligations.

Genetically Considered

Taking into account genetic factors or information in evaluation or decision-making processes.