The Sahara dust contains sand, salt, minerals, and dirt.
The correct answer is minerals. Sahara dust contains a variety of minerals which can be beneficial to the places where it spreads. To determine this answer, we can do a quick search on the internet or consult reliable sources such as scientific journals or articles. The mineral composition of Sahara dust includes elements like iron, phosphorus, potassium, and calcium, among others. These minerals can have positive effects on soil fertility and provide nutrients that may be lacking in certain regions. Additionally, Sahara dust can also impact the marine ecosystem by supplying essential nutrients to marine organisms and promoting the growth of phytoplankton.