Final answer:
The correct answer is option 3) The complete oxidation of foodstuffs is a method of energy extraction .The complete oxidation of foodstuffs is a method of energy extraction, where the oxidative metabolism converts food into energy, primarily in the form of ATP.
Step-by-step explanation:
The relationship between energy extraction and the complete oxidation of foodstuffs is that the complete oxidation of foodstuffs is a method of energy extraction. When we consume food, it increases the internal energy of our body by adding chemical potential energy. This is metabolized through an oxidation process, wherein the chemical potential energy of food is transformed into usable energy, which is measured in Calories. Energy consumption can be understood by gauging our oxygen use, as the digestion and metabolic processes essentially involve oxidizing the food we eat. The oxidized food produces reducing equivalents like NADH and FADH₂ that donate electrons to oxygen, subsequently releasing the energy needed to produce ATP, which is known as the energy currency of the cell.
When we eat food, the body metabolizes it through an oxidation process, releasing the chemical potential energy in the food. This process converts the food into energy that the body can use for its internal and external work. So, option 3) The complete oxidation of foodstuffs is a method of energy extraction is the correct answer.