Final Answer:
The process of nature adding to the real property is called B. Accession.
Step-by-step explanation:
Accession in real estate refers to the process by which natural forces, such as water or soil deposition, gradually add to the property. This can include the accretion of land along a riverbank or the buildup of soil over time. It is a passive means of property accumulation resulting from natural processes.
Unlike improvements (option D), which involve human-made additions or enhancements to the property, accession specifically pertains to the gradual and natural changes to the property's boundaries or composition. It is important to distinguish accession from other concepts such as severance (option C), which involves the separation of property or improvements, and situs (option A), which refers to the location or position of a property within its surroundings.
In summary, the correct answer is B. Accession, as it denotes the natural process of nature adding to real property over time. Investors and property owners should be aware of these terms to navigate the legal and conceptual aspects of real estate transactions.