Final answer:
The rate of oxygen uptake by the breathing organ is influenced by atmospheric pressure, the surface area of the organ, and temperature, making the correct answer D) All of the above.
Step-by-step explanation:
The rate of oxygen uptake by the breathing organ depends on several factors, among which are atmospheric pressure, the surface area of the organ, and temperature.
Atmospheric pressure influences the partial pressure of oxygen, which affects the amount of oxygen that diffuses into the blood. A larger surface area of the respiratory organ, such as the alveoli in lungs or gills in fish, increases the capacity for gas exchange.
Additionally, temperature can affect the rate of diffusion and thus the rate at which oxygen is taken up. Therefore, the mentioned correct option in the final answer is D) All of the above.