As the speed of river water slows what is deposited

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Answer now! good pts and a brainliest potatoes are what im like a potatoe irdk have a good day

What will a hypothesis become if supported by repeated expermentation