The diagram Below shows the breaks of five species of birds that deloped over time from one parent species the five spices of birds can be found living in different areas

Answerweathering;

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.