Answer:
D it causes river channels to change shape
Iron was able to show previous orentations of earth's magnetic field
Producers are organisms that have the ability to manufacture their own food. Plants are producers since they make their own food using the process of photo synthesis. At the equator the mass of producers or plants is highest and this value decreases as one moves north or south of the equator. This is because the optimum conditions for plant growth exist there. therefore this means the mass of produces consumed would decrease moving from the equator to the poles.
