What distinguishes a memorial park?

A memorial park is characterized by its use of flush to the ground type markers, which are set at or below the surface level of the surrounding landscape. This design creates a serene, park-like atmosphere, allowing for a more natural integration of the burial sites with the surrounding environment. The flush markers help maintain uniformity across the grounds and facilitate easier maintenance, giving the area a tidy and peaceful appearance.

The other options do not specifically capture the essence of a memorial park. For instance, a cemetery with only upright headstones represents a different style of memorialization that can create a more traditional look, but it does not align with the distinct characteristics of a memorial park. Similarly, a park where memorial services are held regularly emphasizes the ceremonial aspect rather than the physical design and layout of the burial ground. Lastly, a burial ground solely dedicated to military veterans pertains to a specific demographic and purpose, rather than conforming to the general design principles that define a memorial park. Thus, the correct answer highlights the unique feature of memorial parks regarding their ground-level markers.