Which statement about the Sun is true?AThe sun is a red giantBThe sun will become a red giantCThe sun began as a red giantDThe sun cannot become a red giant

To determine the truthfulness of the statements about the Sun, let's analyze each option based on our understanding of stellar evolution:

1. Statement A: The Sun is a red giant.

   • This statement is false. Currently, the Sun is in the main sequence phase of its life cycle, where it fuses hydrogen into helium.

2. Statement B: The Sun will become a red giant.

   • This statement is true. As the Sun ages and exhausts its hydrogen fuel, it will eventually expand into a red giant star in several billion years.

3. Statement C: The Sun began as a red giant.

   • This statement is false. The Sun began its life as a protostar and has been in the main sequence stage since nuclear fusion started.

4. Statement D: The Sun cannot become a red giant.

   • This statement is false. As noted in statement B, the Sun is expected to become a red giant.

Final Answer

The correct statement is B: The sun will become a red giant.