Every solution is composed of a solvent and at least one

           Every solution is composed of a solvent and at least one Solute.

Explanation:
                     Solutions are made up of at least two or more substances. Solutions are Homogeneous uniform mixtures. They are mainly composed of two parts.
               A) A part of Solution which is in excess and large amount is called as Solvent.
               B) A part of Solution which is in less amount is called as Solute.

Example:
               When Salt is dissolved in water it forms a clear homogeneous mixture. In his solution water is solvent while salt is solute.

Sun is explosive itself spread 9 planets.earth is 3rd explosive in the solar system about 500 hundred million years ago . first earth became ice age and freezing climate.centre of earth magma. north zone is artic . south is anatric

And a) oxygen i believe