Final answer:
Without additional context regarding Plant 2's performance criteria or goals, it is impossible to determine which reward level Plant 2 has achieved from the information provided.
Step-by-step explanation:
The question "Which reward level has Plant 2 achieved?" cannot be fully addressed without more context. In order to provide an accurate response, additional data regarding Plant 2's performance criteria or goals is required. Without this context, it is not possible to determine the reward level Plant 2 has achieved. The information provided includes different reward level options and descriptions for other unconnected scenarios, but there is no link to Plant 2's outcomes. Therefore, the answer is that we cannot determine the reward level for Plant 2 with the given information.