sentences: a rainforest is a kind of forest & cutting down trees in a forest causes the number of trees to decrease in that forest ->  cutting down trees in a rainforest causes the number of trees to decrease in that rainforest  cutting down trees in a rainforest causes the number of trees to decrease in that rainforest & a decrease of something is a kind of change ->  cutting down trees in a  rainforest changes that rainforest  rainforests contain many species0 & a rainforest is a kind of forest ->  a rain forest is a kind of environment  cutting down trees in a  rainforest changes that rainforest & a rain forest is a kind of environment & humans changing an environment sometimes causes that environment to be destroyed ->  humans cutting down trees in a rainforest can cause that rainforest to be destroyed  humans cutting down trees in a rainforest can cause that rainforest to be destroyed & rainforests contain many species1 ->  humans cutting down trees in a rainforest causes harm to that rainforest  humans cutting down trees in a rainforest causes harm to that rainforest & harming an environment causes harm to the living things / to the organisms in that environment ->  humans cutting down trees in a rainforest causes harm to the organisms in that rainforest  rainforests contain many species & species means a group of a certain kind of organism ->  rainforests contain many kinds of organisms  humans cutting down trees in a rainforest causes harm to the organisms in that rainforest & rainforests contain many kinds of organisms ->  humans cutting down trees in a rainforest causes harm to many kinds of organisms  humans cutting down trees in a rainforest causes harm to many kinds of organisms & organisms are a part of an environment ->  humans cutting down trees in a rainforest causes harm to much of the environment  humans cutting down trees in a rainforest causes harm to much of the environment & to cut down a rainforest means to cut down trees in a rainforest -> humans cutting down a rainforest causes harm to much of the environment