Respiration is a/an

Respiration is an enzyme controlled process of biological oxidation of food materials in a living cell, using molecular oxygen (${\mathrm{O}}_2$), producing ${\mathrm{CO}}_2$ and ${\mathrm{H}}_2\mathrm{O}$ and releasing energy in a small steps and storing it in biologically useful forms (generally ATP). Hence, respiration is a catabolic, exothermic and oxidative process.
The reaction for respiration is:
${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6 + 6{\mathrm{O}}_2 \to 6{\mathrm{CO}}_2 + 6{\mathrm{H}}_2\mathrm{O} +$ Energy