sentences: water is a kind of natural resource & water is a part of an environment ->  water is a kind of natural resource from an environment  animals / living things require water for survival & if a living thing requires something for survival then that living thing depends on that something ->  animals / living things depend on water  animals / living things depend on water & a human is a kind of animal ->  humans depend on water  water is a kind of natural resource from an environment & humans depend on water -> water is a kind of natural resource from the environment that humans depend on