9. explain how band ratios can be used to reduce topographic shading and emphasise areas of images with high levels of clays and iron oxides. mention any advantages and disadvantages of this technique

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.

Nswer iceland is one of the most active volcanic regions on earth

Chenitsry becuase uts hive