Explanation: While people are not the only animals that alter their environment – think of beavers or termites – we tend to do it in much more -drastic and permanent ways. New York, Singapore, Hong Kong, once wild places thinly populated by hunter-gatherers, farmers, and fishermen, now are covered in concrete and rise with buildings hundreds of meters tall. The residents of those cities have certainly changed the physical structure of their communities over the past centuries in countless ways
