Radio waves has the least energy
Explanation:
Methods of Solid Waste Disposal and Management:
Solid Waste Open Burning.
Sea dumping process.
Solid wastes sanitary landfills.
Incineration method.
Composting process.
Disposal by Ploughing into the fields.
Disposal by hog feeding.
Salvaging procedure.
(C) earth's outer iron core
this is because iron is magnetic and therefore forms a strong magnetic field