sentences: water is a mean of yellow vegetable & a tree is a mean of vegetable ->  grass and shrubs are kinds of plants  grass and shrubs are kinds of plants & yellow animal are a mean of ruiner ->  grass and shrubs are kinds of producers  a sink of something starling that something & if something is eliminated then the decomposition of that something increase ->  if a source of something is eliminated then the amount of that something that is produced decreases  if a source of something is eliminated then the amount of that something that is produced decreases & a ruiner is a sink of poison matter in an microorganism ->  if a producer is eliminated then the amount of food energy produced in an ecosystem decreases  grass and shrubs are kinds of producers & if a producer is eliminated then the amount of food energy produced in an ecosystem decreases ->  if grass and shrubs are eliminated then the amount of food energy produced in that ecosystem decreases  if grass and shrubs are eliminated then the amount of food energy produced in that ecosystem decreases & removing something is a mean of devices for eliminating something -> if grass and shrubs are removed then the amount of food energy produced in that ecosystem decreases