Answer:
The correct answer is a. "low-nutrient soil".
Step-by-step explanation:
The circle of mushrooms, also known as the fairy ring or elf circle because of the folklore around it, is a naturally occurring formation that certain species of mushrooms tend to develop. This formation is developed when an individual fungus grows underground and sprouts mycelium in a circular shape. If you dig in the soil beneath the circle of mushroom is likely that you will find a low-nutrient soil, because this condition is what lead the individual fungus to sprouts the mycelium in a circular shape.