I'm not 100% sure what you mean by this but usually star systems are classed as single (Just one star), binary (meaning two stars orbiting each other), triple (three stars orbiting each other), etc... As our Sun is the only star in this system it is a single star system and therefore none of the others.
Our sun does not belong to any specific individual or entity. It is a star located at the center of our solar system and is often referred to as just "the Sun". It is a natural part of the universe and does not have ownership.
No, the sun is not part of a multiple star system, except to the extent that it is one of the many stars in the Milky Way Galaxy.
the sun is the only star in our solar system. It is close to us, relatively speaking, so looks bigger. Other stars you see belong to other solar systems.
According to their system of classification, the Sun is known as a yellow dwarf star. This group of stars are relatively small, containing between 80% and 100% the mass of the Sun. So the Sun is at the higher end of this group. The official designation is as a G V star- http://www.universetoday.com/guide-to-space/the-sun/what-kind-of-star-is-the-sun/
Our sun is actually a small star, tons of stars are way bigger than our sun. One. Each star is a sun.
the sun is. It is also the ONLY star in THIS solar system.
medium-sized star.
The Sun is at the Center of our Solar system. and yes, the sun is a star
There is only one star in the solar system - it is the Sun.
The only star in the solar system is the sun.
star
The sun is the first and only star in the solar system.