Answer:The correct answer is option D: Ecosystems experience change through human activity and natural events.
Step-by-step explanation:
Natural events such as wildfires and floods can result in change for an ecosystem, Human activity can effect an ecosystem, for example, deforestation, pollution and urbanization can significantly impact an ecosystem and are all caused by human activity. Therefore we can surmize that both natural events and human activity can result in change in an ecosystem.