Which group of data shows the maximum temperature over the last 6 hours?

The correct choice reflects a specific representation of meteorological data, indicating the recorded maximum temperature over the last six hours. METAR reports often include a section that specifies temperature information, commonly showing current temperature or temperature changes over recent hours. In this context, the "1 group" is associated with temperature data, prominently demonstrating the maximum temperature measurement as part of the ongoing weather observation.

In contrast, the other options do not correspond to the standard grouping associated with maximum temperature data in METAR reports. Understanding that the temperature data is typically presented in a recognizable format is crucial. The first group uniquely represents temperature, making it the most relevant choice for identifying maximum temperature readings over a defined recent timeframe.