The correct answer is A. They benefit grasslands by encouraging new growth.
Explanation:
1. Wildfires are a natural part of many ecosystems, including grasslands. When a wildfire occurs in a grassland, it can actually benefit the area by encouraging new growth.
2. Wildfires clear out old vegetation and create space for new plants to grow. The heat from the fire can also trigger the germination of certain plant species' seeds that require fire for growth.
3. This process helps to rejuvenate the grasslands, promoting biodiversity and providing opportunities for new plant species to establish themselves.
4. While wildfires can be destructive and have negative impacts, they also play a role in the natural cycle of grassland ecosystems by promoting renewal and growth.