Conserve natural resources, energy and landfill space.
Answer: Physical changes in nature could then be erosion in a mountain, the melting of snow, and a river freezing over from the cold. Since none of these changes affect the chemical composition of the mountain, the snow, or the river, they are physical changes.
Explanation:
Distance=2m
because 200cm = 2m
so 4m-2m=2m
Copper is the best material
