Which of the following best describes one way in which water is present at Iguazú Falls?

• A. As liquid water flowing over the falls
• B. As dissolved salts forming the main structure of the falls
• C. As solid ice forming the waterfall
• D. As water vapor only, with no liquid present

Answer: (A)

Verified step by step guidance

1. Understand the physical states of water: Water can exist in three primary states—solid (ice), liquid, and gas (water vapor). Each state depends on environmental conditions such as temperature and pressure.
2. Analyze the context of Iguazú Falls: Iguazú Falls is a natural waterfall located in a tropical region. Waterfalls are typically characterized by liquid water flowing over rock formations.
3. Eliminate incorrect options: Dissolved salts forming the main structure of the falls is incorrect because the structure of the falls is primarily composed of rock, not salts. Solid ice forming the waterfall is unlikely due to the tropical climate of Iguazú Falls. Water vapor only, with no liquid present, is incorrect because waterfalls are defined by the movement of liquid water.
4. Focus on the correct description: Liquid water flowing over the falls is the most accurate description of how water is present at Iguazú Falls. This aligns with the observable phenomenon of waterfalls.
5. Conclude the reasoning: Based on the analysis, the best description of water at Iguazú Falls is as liquid water flowing over the falls, which matches the natural characteristics of a tropical waterfall.