The correct answer is (B) The ecosystem has decreased resiliency due to decreased biodiversity.
A catastrophic event such as a wildfire can have severe consequences for the affected ecosystem. Wildfires can destroy large areas of vegetation, which can lead to soil erosion, loss of habitat, and changes in the local climate. In addition, wildfires can also cause a decline in biodiversity, as many species may not be able to survive in the new conditions.
Biodiversity is an important factor in determining the resiliency of an ecosystem. A more diverse ecosystem is generally more resilient to environmental stresses and disturbances. This is because a diverse ecosystem can better absorb and recover from the impacts of catastrophic events. However, if a catastrophic event such as a wildfire causes a decrease in biodiversity, the ecosystem may become less resilient and more vulnerable to future disturbances.