Which of the following best represents a legally permissible use of a property?

The answer highlighting the development of commercial offices in a commercial zoning area demonstrates a legally permissible use of property due to adherence to local zoning ordinances and land use regulations. Commercial zoning is specifically designated for businesses and commercial activities, allowing for the construction and operation of offices, retail, and other enterprise activities that align with the intent of the zoning laws.

Zoning regulations are established by local governments to manage land use and ensure that different areas of a community serve their designated purposes without conflicting with one another. By building offices in an area zoned for commercial use, the development complies with these regulations, helping to maintain the intended character and functionality of the area.

The other scenarios involve uses that typically violate zoning regulations or require special permissions that may not be granted. For example, building a casino in a residential area is unlikely to be permitted because such a development would disrupt the residential character and may conflict with community standards. Constructing a public park on private land generally requires the property owner’s consent and might involve complex legal processes, including eminent domain in certain cases. Planting crops on a rooftop garden in a city may be permissible but doesn't represent the same clear legal compliance with zoning and land use restrictions seen in the development of offices in a commercial area.