The correct statement which describes a characteristic of a spiral galaxy is: It is shaped like a pinwheel. Option a is the correct answer.
What is a galaxy?
A galaxy can simply be defined as a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
So therefore, the correct statement which describes a characteristic of a spiral galaxy is: It is shaped like a pinwheel. Option a is the correct answer.
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