Read the following passage:
Passage: The Amazon rainforest serves not only as a home to countless species of wildlife but also acts as a critical carbon sink for the planet. Its vast expanse helps regulate the Earth's climate by absorbing carbon dioxide from the atmosphere. Unfortunately, deforestation poses a significant threat to this ecosystem.
This passage is structured to first inform the reader about the importance of the Amazon rainforest, followed by an indication of the problems it faces. This organization highlights the impact of deforestation in a clear manner.