Question

which is one physical property that all stars have?
○ they are made of gases.
○ they shine very brightly.
○ they have a triangle shape.
○ they contain iron in their cores.

Explanation:

• Not all stars shine brightly; dim red dwarfs exist.
• Stars form spherical (not triangular) shapes due to gravity.
• Only massive stars produce iron in their cores; small stars do not.
• All stars are composed primarily of gaseous hydrogen and helium.

Answer:

A. They are made of gases.