Step 1: Understand the concept of a partnership firm.
A partnership firm can indeed be a trading concern, as it can operate with the purpose of conducting business activities, such as trading or providing services.
Step 2: Evaluate the statement.
Partnership firms are often established with the goal of running a trading business, which aligns with the notion of a "trading concern."
Step 3: Conclusion.
Therefore, the statement "Partnership firm is a trading concern" is correct, and I agree with it.
Final Answer: \[ \boxed{Agree} \]