place the soil horizons in the correct order from top to bottom. predominantly organic, substratum or zone of mechanical weathering where bed rock is being broken down, unweathered rocks, chemically weathered minerals, mix of humus.

The telegraph idk what else to tell you you are probably just gonna copy it which btw i would do the same thing but it says i have to have at least 20 characters so yeah there you go 

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.

Ithink its d.stratum