Which of the following best summarizes the reason living things depend on oxygen? Question 6 options: Oxygen is an element of water. Oxygen is involved in protein production. Oxygen is used during cellular respiration. Oxygen is necessary for digestion.

The correct answer is option A

Water is the most important component of all living beings. The dependence of organisms on oxygen is much because it an important component of water which is required for the survival. The various types of life processes and metabolic reactions depends on the water to take place. The body is dependent on water for it.