Step 1: Understanding listening skills
- Listening skills are essential for effective communication. They involve not just hearing, but also understanding and responding appropriately to the information being conveyed.
Step 2: Analyzing the options
- (A) Outline: Outlining is not typically a part of listening skills; rather, it is an action performed to organize information.
- (B) Understand: Understanding is a core part of listening, as it involves comprehending the message.
- (C) Response: Responding is a crucial component of listening skills, as it demonstrates active engagement with the speaker.
- (D) Listening: Listening itself is the fundamental skill being assessed in this question.
Step 3: Conclusion
Thus, the correct answer is (A) Outline, as it is not directly related to listening skills.
\[
\boxed{\text{Correct Answer: (A) Outline}}
\]