This is a forest habitat 50 years ago. Lots of animals and plants live here together.
20 years later, there have been some changes to the habitat. Deforestation (or removing trees) has happened, so there are some plants and animals that can no longer live there.
Today, that same forest is now a neighborhood. Instead of lots of plants and animals living there, there are houses, roads, and people. As a result of deforestation, the habitat has changed in big ways.