The closer to the top the metal is in the list, the more active the metal is and the stronger a reducing agent the metal is. When two different metals are involved in a redox reaction, the metal higher in the list will be oxidized and give up electrons that will reduce the cation of the less active metal.
The answer is PO4^-3 is non-polar.
B. (twenty characters blah blah blah) Have a great day/night!
Sandy soil because the sand will erode faster then the clay will causeing the well to cave in