Which of the following best explains how the water cycle is similar to the circulatory system in living organisms?

• A. Both remove carbon dioxide from the environment.
• B. Both are responsible for producing energy for the system.
• C. Both function only in multicellular organisms.
• D. Both involve the continuous movement of essential substances throughout a system.

Answer: (D)

Verified step by step guidance

1. Understand the water cycle: The water cycle involves the continuous movement of water through processes such as evaporation, condensation, precipitation, and infiltration. It ensures the distribution of water, an essential substance, across the environment.
2. Understand the circulatory system: The circulatory system in living organisms involves the continuous movement of blood, which carries essential substances like oxygen, nutrients, and waste products throughout the body.
3. Identify the similarity: Both systems involve the continuous movement of essential substances (water in the water cycle and blood in the circulatory system) to maintain balance and support life processes.
4. Eliminate incorrect options: Review the other choices provided in the problem and determine why they do not accurately describe the similarity between the water cycle and the circulatory system. For example, neither system is solely responsible for producing energy, nor do they function only in multicellular organisms.
5. Conclude the correct answer: Based on the analysis, the correct explanation is that both systems involve the continuous movement of essential substances throughout a system, ensuring proper functioning and balance.