Which statement accurately describes binary star systems
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A binary star is a star system consisting of two stars orbiting around their common barycenter. Systems of two or more stars are called multiple star systems. These systems, especially when more distant, often appear to the unaided eye as a single point of light, and are then revealed as multiple by other means.

A star system consists of two star orbiting around their common barycenter. Systems with two or more stars are usually called multiple star systems.

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as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.