Some forest fires are beneficial because _____.

• A. they permanently destroy all plant life in the area
• B. they prevent any new plant species from growing
• C. they increase soil erosion and loss of habitat
• D. they help recycle nutrients back into the soil

Answer: (D)

Verified step by step guidance

1. Understand the role of forest fires in ecosystems: Forest fires are natural events that can play a crucial role in maintaining the health of certain ecosystems. They are not always destructive; instead, they can have beneficial effects under specific conditions.
2. Eliminate incorrect options: Analyze the provided options. The first option, 'they permanently destroy all plant life in the area,' is incorrect because forest fires do not permanently destroy plant life; many plants are adapted to regrow after fires. The second option, 'they prevent any new plant species from growing,' is also incorrect because fires often create opportunities for new plant species to grow. The third option, 'they increase soil erosion and loss of habitat,' is a negative consequence of fires, not a benefit.
3. Focus on the correct concept: The correct answer is related to the recycling of nutrients. When organic material such as plants and trees burn, the nutrients stored in them are released back into the soil in the form of ash, enriching the soil and promoting new plant growth.
4. Connect to ecological principles: This process is part of nutrient cycling, a key ecological concept. Nutrient cycling ensures that essential elements like nitrogen, phosphorus, and potassium are made available to plants, supporting the regeneration of the ecosystem.
5. Conclude with the correct answer: The correct answer is 'they help recycle nutrients back into the soil,' as this highlights the beneficial role of forest fires in nutrient cycling and ecosystem recovery.