A living thing that eats other living things?

It is a consumer

Explanation:

It cannot make its own food like plants, so it eats, or consumes other animals. Hope this helps.

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.