Why respiration and decomposition processes are considered to be an exothermic process?

Respiration and decomposition processes are exothermic process because:

i. We all get energy from the food we eat.

ii. During digestion, food is broken down into simpler substances.

iii. For example, Carbohydrates (rice, potatoes, bread) are broken down to form glucose.

iv. This glucose combines with oxygen and provides energy to the whole body.