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...Textbook answer key environmental science chapter populations and communities section assessment a habitat provides food water shelter other things an organism needs to reproduce b the might die biotic factors are living parts of that interacts with abiotic nonliving grass birds snake badger bison prairie dogs soil air temperature sunlight c all organisms need carry on life processes plants algae make in photosynthesis depend directly or indirectly for population community ecosystem because consists different together sample if is source another decreases then second may decrease due starvation skills lab note store bought potting result better more uniform growth expected outcome will grow thrive as long not too little much provided receive decline they become crowded nutrients depleted analyze conclude any microscopic gravel charcoal light yes factor insect probably would survive it eat faster than could paragraphs should explain model shows how interact within closed complex contain...