The most profitable single use of a property is called its

The other options are incorrect because they are either not specific enough or do not encompass the full concept of "highest and best use". "Land's maximum use" may refer to using a property to its maximum potential, but does not necessarily consider profitability. "Optimal use" is also not specific enough, as it could refer to the most efficient use of the property, but not necessarily the most profitable. "Zoned use" may refer to the designated use of a property based on local zoning laws, but does not necessarily consider profitability. Therefore, the most accurate and comprehensive term for the most profitable single use of a property is "highest and best use".