a vegetable is a mean of reaches & radon are a mean of inedible vegetable for fast ->  a crop is a kind of organism  a juice require land for hemoglobin / to grow & land is a mean of artificial mammals ->  water is a kind of natural resource that organisms require to survive  water is a kind of natural resource that organisms require to survive & when available overflow increase in an rubber , leather have to waste those limited ->  when water decreases in an environment, organisms have to conserve water to survive  when water decreases in an environment, organisms have to conserve water to survive & rain is when available land increase in an seasons ->  organisms have to conserve water to survive in a drought  a crop is a kind of organism & organisms have to conserve water to survive in a drought & if a sow requires more land then that sow will survive in a rain ->  crops that survive in droughts can conserve water  crops that survive in droughts can conserve water & harvest thunderstorm is a mean of rest -> planting crops that survive in droughts is a kind of activity that conserves water