well because tjey are small and could be transported in ships and in other transportation.
Answer:
b. trade winds (or tropical easterlies)
the ones located on the north and south poles are the polar easterlies and the one in between is the prevailing easterlies.
metaphase I'm not sure but I think it is the answer
The major organ of the circulatory system that causes blood to flow through the body by its pumping action is the heart.