What is a star primarily composed of?

• A. Water and minerals
• B. A massive ball of gas
• C. Solid rock
• D. Frozen particles

Answer: (B)

A star is primarily composed of a massive ball of gas, mainly hydrogen and helium. These gases undergo nuclear fusion in the core of the star, which produces heat and light; this is the process that powers the star and allows it to shine. The immense gravitational forces within a star hold the gases together, maintaining its structure and stability.

The other options, such as water and minerals, solid rock, or frozen particles, do not accurately represent the composition of a star. These materials are typically found on planetary bodies or in other celestial phenomena, rather than within a star itself, which is dominated by gases and high temperatures.