According to the given condition, the agent doing the process of perceiving. Thus the correct answer is D.
Perceiving refers to the implementation of any concept based on learning, understanding, and observation of skills to make effective decisions.
In this situation, the agent has observed changes in the environment and based on his observation and analysis began to take action for decision making.
These perceiving nature helps to enhance the process of learning to seek improvement.
Therefore, option D reflects the perceiving nature of agent.
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