Biology

The correct answer is: D.all of these are possible.

Invasive species can spread from their native ecosystems through a variety of human activities, including:

1.The exotic pet trade: Many species, particularly plants and animals, are taken from their native habitats and sold as pets. If these species escape or are released into new environments, they can become invasive.

2.Being transported by humans: Humans inadvertently transport invasive species through global trade, travel, ...