Answer;
All of the above.
Introduction of an invasive species, wildfire or a mudslide may cause a habitat change.
Ecosystem.
A habitat is an ecological or an are in an ecosystem that is inhabited by specific species of animals, plants or types of organisms.
Habitat change or interference with a particular habitat interferes with the survival of organisms in the particular habitat. For example; Introduction of an invasive species to a habitat may have negative impacts, such that the species can cause harm to the new environment and interfere with the food chain. Wildfire on the other hand may lead to habitat loss, as it may burn down trees destroying the forest habit and organisms in it.