Answer:
The key concept is - causes and effects of deforestation.
Explanation:
It explains that humans very commonly deforest forests, rather than natural deforestation. Cutting down trees, burning forests, and making room for new houses is a cause of deforestation. The effect of deforestation is the loss of habitats for animals. The animals that previously lived there have to move to a different habitat and adapt there because of the deforestation that the humans caused.