an animal requires enough nutrients to maintain good health / survive & if a living thing requires something then that something has a positive impact on that living thing ->  nutrients have a positive impact on an living thing's health  nutrients have a positive impact on an living thing's health & eating / taking in food is used to get nutrients / energy by animals / living things ->  getting nutrients from eating has a positive impact on a living thing's health  getting nutrients from eating has a positive impact on a living thing's health & some minerals are nutrients ->  getting minerals from eating has a positive impact on a living thing's health  eating leafy vegetables is important for human health & if something has a positive impact on something else then that something is important to that something else ->  eating leafy vegetables has a positive impact on human health  getting minerals from eating has a positive impact on a living thing's health & eating leafy vegetables has a positive impact on human health -> leafy vegetables are a good source of minerals