I think I know what you're trying to ask, but I'm not sure. Your question is about the chemical properties of water, but I don't understand what you mean by "natural protection." If you would explain to me what you mean by that, I could understand your question better.
What is a platypus's natural protection
water & oil
Natural protection is a defense mechanism such as the skunk's spray. Camouflage coloring in butterflies is another form of natural protection.
...water. the best type is either natural or vitamin enhanced.
natural
The yellow kind.
the tigers natural protection is its claws teeth and color of fur
oil water gas etc
water is a natural resource because it is used for cooking , drinking , bathing , and ,many other use because water is all around us.
The Environmental Protection Agency (EPA) is the government agency responsible for protecting natural resources such as air, water, and land in the United States. Its mission is to ensure the protection of human health and the environment through regulatory actions and policies.
Natural soundscape (water, land, wind …)
unpredictable flooding of natural barriers for protection . Natural Resources limited.