Komórki tej tkanki mają postać długich rurek, które przewodzą wodę i sole mineralne​

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.

I'm pretty sure that the answer is c.

Could you answer my question* ! * how many people in ghana have well-paid jobs and are not poor?