Use the spectrum readings from the sun (upper) and a star (lower) to answer the question.

To answer the question regarding the spectrum readings from the sun and the star, we need to understand the concepts of redshift and blueshift.

- **Redshift** occurs when an object is moving away from the observer, causing the light to shift toward the red end of the spectrum.
- **Blueshift** occurs when an object is moving toward the observer, causing the light to shift toward the blue end of the spectrum.

Without seeing the spectrum readings, a general inference can be made based on the shifts:

1. If the spectrum of the star shows lines that are shifted toward the red end compared to the sun's spectrum, this indicates a redshift, meaning the star is moving away from the sun.
2. If the spectrum of the star shows lines that are shifted toward the blue end compared to the sun's spectrum, this indicates a blueshift, meaning the star is moving toward the sun.

Given the options without spectrum images, the correct answer will depend on whether the spectrum of the star shows a redshift or a blueshift. However, I can't determine which specific option is correct without that information. Please refer to the provided spectrum readings to see if there is a shift towards red or blue.

- If there's a **redshift**, select: "There is a red shift, which means that the star is moving away from the sun."
- If there's a **blueshift**, select: "There is a blue shift, which means that the star is moving toward the sun."

If you can identify the shift from the spectrum readings, that will indicate the correct inference.