What occurs during a decomposition reaction?

decomposition reaction occurs when the bonds of the reacting compounds are broken and new combinations are formed. A compound partitions into its components.

A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. Thesere actions often involve an energy source such as heat, light, or electricity that breaks apart the bonds of compounds. ~ google

Spherical shaped cell might increase the surface area and decrease the volume.

True to the fact it is actually false