Question

As the burning of hydrogen finishes and helium starts burning, the temperature and pressure of the star _________, thereby _________ the star.

• A. decrease, expanding
• B. decrease, contracting
• C. increase, expanding
• D. increase, contracting

Answer 1

The correct option is C increase, expanding

Once the primary fuel of the star is exhausted, the star starts burning helium and other higher elements. This causes the increase in temperature and pressure of the star. On doing so, the star expands into a red giant or a super red giant.