I think the correct answer from the choices listed above is option D. The type of dispersal that occurs due to global trade would be jump. <span>Jump-dispersal is the movement of individual organisms across great distances, followed by the successful establishment of a population.</span>
If NASA had constructed a Space Shuttle without knowing if it would be safe for its passengers, there could be many casualties. So they would test it beforehand using a model, to make sure that it will be safe and sturdy for when they build it.
