The location that would MOST LIKELY fulfill Nate's goal of starkly contrasting with the theme of child malnutrition while also connecting with his message is:
a fancy art gallery during peak hours
This setting would provide a stark contrast to the serious nature of his photos by situating the theme of child malnutrition within an environment associated with indulgence and privilege. It would highlight the disparity between the subjects of his photographs and the affluent audience in attendance, thereby solidifying his message.