Protostars with Emission Lines as Well as Absorption Lines in Their

question 85

Multiple Choice

Protostars with emission lines as well as absorption lines in their spectra and whose luminosity can change irregularly as they eject material into space are

• A) asymptotic giant branch stars.
• B) T Tauri stars.
• C) red-giant stars.
• D) main-sequence stars.

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Definitions:

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The process of distinguishing a product or service from others in the market to make it more attractive to a target audience.

Shopping Product

Goods that consumers purchase after comparing quality, price, and style from several sellers, requiring more decision-making effort than routine purchases.

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Unsought Product

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