The most accurate response would be:
Competition would decrease. Wildfire would decrease the number of individuals competing for resources, making more resources available per individual.
This is because after a wildfire, the immediate impact often involves a reduction in the number of plants and animals in the affected area, which can lead to less competition for the remaining resources. However, it's important to note that in the longer term, certain species may rebound quickly, and new growth may occur, potentially increasing competition again as the ecosystem recovers.