Which of the following lists three primary ways water leaves the human body?

• A. Urination, sweating, and exhalation
• B. Photosynthesis, respiration, and osmosis
• C. Digestion, absorption, and filtration
• D. Ingestion, secretion, and diffusion

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by understanding the context of the question. The problem is asking about the primary ways water exits the human body, which involves physiological processes related to maintaining water balance.
2. Step 2: Analyze each option provided. For example, 'Urination, sweating, and exhalation' are processes directly involved in water loss from the body. Consider how each process contributes to water leaving the body.
3. Step 3: Evaluate the second option, 'Photosynthesis, respiration, and osmosis.' Note that photosynthesis does not occur in humans, as it is a process specific to plants. Osmosis is a passive movement of water across membranes, not a direct method of water leaving the body.
4. Step 4: Examine the third option, 'Digestion, absorption, and filtration.' These processes are primarily involved in nutrient and water processing within the body, not direct water loss.
5. Step 5: Assess the fourth option, 'Ingestion, secretion, and diffusion.' Ingestion refers to water intake, not loss. Secretion and diffusion may involve water movement but are not primary methods of water leaving the body. Conclude that the first option is the most accurate.