Answer
The result of "protecting national parks and forests" from "forest fires" is a healthier Ecosystem.
Forest fire is one of the big issues which leads to destroying the forest ecosystem.
Due to the forest, many wildlife and unique plants are affected, etc.
Amount of carbon dioxide in the environment increases which leads to climate change.
The vegetation of the region gets destroyed and the land becomes hydrophobic.
The natural water body also get affected by the forest fires.
hence, the correct answer will be option E
