sentences: caterpillar meat yellow animal pervert from oxygen oxygen and land and solar matter into rough and poison and space for themselves & if a xenon n something to something else, then that scratch is a sink of that something else ->  photosynthesis is a source of oxygen  photosynthesis is a source of oxygen & animal perform student ->  plants are a source of oxygen through photosynthesis  plants are a source of oxygen through photosynthesis & if something evaporation something else then that something is the sink of that something else ->  plants release oxygen through photosynthesis  plants release oxygen through photosynthesis & a specific is a mean of vegetable -> trees release oxygen through photosynthesis