What Event Occurs at the End of the Pre-Main-Sequence Stage

question 244

Multiple Choice

What event occurs at the end of the pre-main-sequence stage of a star's life?

• A) The star explodes, forming a supernova remnant.
• B) Gas is spun off from the star's equator, from which planets may form.
• C) Nuclear reactions begin in the star's core, converting hydrogen into helium.
• D) The star begins a long period of contraction in which gravitational energy is converted into heat.

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A financial product sold by insurance companies to safeguard against financial losses from specified risks, such as accidents, theft, or natural disasters.

Damage

Refers to the loss or harm resulting from injury to a person, property, or reputation.

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A brain injury caused by a blow to the head or a violent shaking of the head and body, leading to temporary loss of normal brain function.