What right do all real estate owners have regarding their lands?

The correct choice highlights the essential principle known as "the right to use land without interference," which is fundamental to property ownership. This right allows property owners the freedom to utilize their land as they see fit, provided that they are compliant with relevant local laws, zoning regulations, and covenants. It protects owners from unauthorized intrusions or disruptions by third parties, including neighbors and government entities.

This aspect of property rights is closely tied to the concept of quiet enjoyment, which ensures that the owner can possess and enjoy their property without external disturbances. It empowers owners to exercise control over their property, fostering a sense of security and stability in their ownership.

Other choices, while they address aspects of property rights, do not encompass the broad and foundational right that property owners possess to use their land without interference. For instance, the right to sell without limitations could be restricted by factors such as existing liens or other legal obligations. Similarly, the right to build on any part of the property could be limited by zoning laws or other regulatory considerations. The right to increase ownership interest may also not universally apply, as it could depend on specific legal restrictions or agreements. Thus, the comprehensive nature of the right to use land without interference makes it the most suitable answer.