Which of the following is a key feature of agricultural land easements?

The correct response identifies a key feature of agricultural land easements as being a voluntary program that specifically purchases only development rights. This means that landowners can sell their development rights to a conservation organization or government agency, which ensures that the land remains in agricultural use and is protected from being developed into urban or residential spaces. This arrangement allows farmers to retain ownership of their land and continue agricultural operations while also benefiting financially from the sale of rights.

This feature is important because it enables the long-term protection of farmland, thus preserving open spaces, local food systems, and rural communities. The voluntary nature of the program is vital as it respects the landowner's wishes and choices regarding their property, allowing them to choose when and how to engage with such conservation measures.

In contrast, other options do not accurately reflect the purpose and function of agricultural land easements. The notion that they would purchase all land rights misrepresents the agreement's focus on development rights only. Additionally, the concept of mandating urban development contradicts the fundamental purpose of keeping land agricultural, while the idea that easements prohibit any agricultural activity does not align with the essential goal of sustaining agricultural operations.