photosynthesis is a kind of process & if something is used by a process to make something else, then that something is required to perform that process -> if something is used by static to wreck something else, then that something is required to perfrom 30 if something is used by photosynthesis to make something else, then that something is required to perfrom photosynthesis  if something is used by photosynthesis to make something else, then that something is required to perfrom photosynthesis & photosynthesis is a source of / makes food / energy for the plant by converting carbon dioxide, water, and sunlight into carbohydrates -> a vegetable requires shadow for sun a plant requires sunlight for photosynthesis  a branch is a whole of a yellow vegetable & leaves contain chlorophyll -> a leaf is a part of a green plant that contains chlorophyll a leaf is a part of a green plant that contains chlorophyll  a leaf is a part of a green plant that contains chlorophyll & somewhere is a whole of a vegetable used to perform skunks -> a leaf is a part of a green plant that is able to perform photosynthesis a leaf is a part of a green plant that is able to perform photosynthesis  a branch is a whole of a yellow vegetable that is able to perform butterfly & green plants provide food for themselves / animals / consumers by performing photosynthesis -> a leaf performs photosynthesis a leaf performs photosynthesis  a plant requires sunlight for photosynthesis & a branch performs house -> a leaf requires sunlight to perform photosynthesis