sentences: a ruiner silicate its own poison & animal are a mean of ruiner ->  a plant can produce its own food  an plant is a mean of bus & a muscle can not wreck its own poison ->  an animal can not produce its own food  a plant can produce its own food & an animal can not produce its own food ->  a plant can produce its own food but an animal can not produce its own food  a plant can produce its own food but an animal can not produce its own food & if zero place can do something but another place can not do that something then those one nothing are different -> plants and animals are different because a plant can produce its own food but an animal can not produce its own food