Concept:The supply of land is fixed by nature, making it inelastic.
Explanation:In economics, land means all natural resources given freely by nature, such as the soil, rivers, forests, and minerals.
Unlike labour, capital, and wages, the total supply of land cannot be increased or decreased by human effort.
Its quantity is limited and does not respond to changes in price or rent.
Therefore, the supply of land is described as fixed or perfectly inelastic.
Other factors like labour and capital can be varied in supply, so they are relatively more elastic.
Answer:D. land