Hope you can answer the question.
Are cheap
Sustain life on Earth
Are the source of row materials needed by human beings
Green plants need oxygen to make food.
Soil is a habitat to various types of living things.
We need water for drinking,cleaning and bathing.
Brittle
Shiny appearance
Poor conductors of heat
Is ductile
Can be polished
Is good conductors of electricity
Air
Sand
Water
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