Iron is an essential nutrient for all organisms, and marine phytoplankton must extract iron from seawater. Iron produced in seawater is usually very small, so for the vast ocean area, the limitation of iron limits the growth of phytoplankton Iron in seawater mainly comes from aerosols in rivers. However, most of these iron-containing aerosols are deposited in offshore areas, so the transportation of wind and dust has become the main form of iron supply in oceans far from the continent, especially for less iron. In areas such as high latitudes, this replenishment can greatly promote the growth of phytoplankton. What does the following statement agree with the original? ['The main function of deep-sea phytoplankton is to decompose iron-containing suspended matter.', 'Iron in the ocean in low latitudes mainly comes from wind and dust transport.', 'Iron-bearing materials transported by wind and dust are important to marine phytoplankton.', 'Iron in the deep sea is mainly in the form of river suspended matter.']