Concept:Land is the factor of production that is relatively indestructible and immobile.Explanation:Land is a free gift of nature, so its supply cannot be easily increased.It is indestructible because its productive capacity is permanent and does not wear out easily.It is immobile because it cannot be physically moved from one location to another.Capital and labour can both be increased and moved, but land is fixed in supply and location.Rent is not a factor of production; it is the reward paid for the use of land.Answer:Land (Option C).