Respuesta :
They may be wind blown, rain splashed, carried by animals, or moved in soil or water. Almost all short-distance spread is through these natural dispersal mechanisms. In their home territory, short distance spread is rarely a problem because the resident plants and animals have evolved to coexist more or less peaceably.
Answer:there were brought in over seas
(Like they were on cargo that was on a cargo ship)
they were released into the wild by someone
(Like they were a pet)
Explanation:
Sorry I only know 2