Answer: D. The sun is one of the largest stars in the galaxy
Step-by-step explanation:
Let us look through the options to see which one is incorrect.
✓ A. The sun is made up of gas.
True! The sun is made up of gas.
B. The sun emits heat and light.
True! The sun does emit heat and light.
C. The sun is the center of our solar system.
True! Our solar system revolves around our sun.
✗ D. The sun is one of the largest stars in the galaxy
False! Our sun is far from being the largest star in the galaxy, so this "fact" is not true. This means that option D is the answer to your question.
The image attached is from NASA.