Invasive species can enter a habitat in many ways. how were these invasive species introduced?

A species of rats entered a habitat stowed away in a train.=unintentional introduction  

A man added invasive water hyacinths to beautify his private lake.=intentional introduction  

A flood prompted many aquatic species to inhabit a new area.=loss of habitat

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.

nothing

hope this !