Final answer:
Water is crucial for life on Earth due to its role in cellular processes, making up 60-70% of the human body and its unique properties that support life's diversity. Its presence on other planets is a key indicator of potential life. Earth's abundant water resources distinguish it from other celestial bodies.
Step-by-step explanation:
Importance of Water for Survival
Water is essential to life as we know it for a multitude of reasons. Comprising approximately 60-70 percent of the human body, water plays a crucial role in various cellular processes. Without water, these processes could not occur, and life would not exist. Scientists actively seek evidence of water on other planets because its presence could suggest that life could or once existed there. Earth is often referred to as the Water Planet due to its abundance of liquid water which covers about 70% of the planet's surface.
Furthermore, the unique properties of water, such as its polarity and hydrogen bonding, make it a vital resource for maintaining the diversity and complexity of life. Notably, humans cannot survive for more than a few days without water. It is also vital for oxygen and food production, as water is consumed during photosynthesis to release oxygen and create energy-packed biomolecules that serve as food.