Final answer:
The sliding side doors of the 2021 NV200 provide improved functionality and ease of access.
Step-by-step explanation:
One of the benefits of the 2021 NV200's sliding side doors is improved functionality and ease of access. These doors slide open horizontally, which allows for better maneuverability in tight spaces, such as crowded parking lots. The sliding doors also provide convenient access to the cargo area, making it easier to load and unload items.