Why do you think that this is the only rabbit on the only patch of grass?

The presence of only one rabbit on a solitary patch of grass could suggest a few possibilities: it may be a lone individual that has been separated from its group due to territorial behavior or environmental factors. Alternatively, the patch of grass might be isolated, making it difficult for other rabbits to access the area. Lastly, the rabbit could be a Survivor in a habitat that has been impacted by predators or human activity, leading to a decline in its population.