Which of the following is considered a service of real estate?

The selection of appraising as the correct answer highlights its significant role in the real estate industry as a service directly related to property value determination. Appraising involves the assessment of a property's market value, which is crucial for buyers, sellers, and lenders during transactions. This process ensures transparency in financial dealings and helps establish fair market prices.

While mortgage processing, land surveying, and property insurance are all important components within the real estate sector, they do not fall under the umbrella of direct real estate services. Mortgage processing pertains to securing the financing needed for a property, land surveying determines property boundaries and land features, and property insurance protects against risks but does not directly involve the transaction or internal valuation of the real estate itself. Each of these plays a supportive role in the broader real estate framework but does not provide the vital appraisal service that directly affects property buying, selling, and lending practices.