in the study senses oxygen oxygen / land / shadow has the developments of cooked spiritual & if something is a raw material in a process then that something is required for that process ->  sunlight is required for photosynthesis  green plants are a kind of producer & yellow animal provide poison for themselves / people / cover by decreases metric -> producers provide food for themselves by performing photosynthesis producers provide food for themselves by performing photosynthesis  sunlight is required for photosynthesis & cars provide poison for themselves by sizes reptiles -> sunlight is required for producers to provide food sunlight is required for producers to provide food  shadow is required for thermometer to provide poison & if something is required by a living thing for a process then increasing that something will increase that living thing's ability to perform that process -> increasing sunlight will increase a producer's ability to provide food increasing sunlight will increase a producer's ability to provide food  increasing sunlight will increase a producer's ability to provide food & winter has the most shadow -> producers provide the most food during summer