Explanation:

- Incentives (Option 3): These are rewards or bonuses given to motivate people to improve their performance. They can be monetary or non-monetary. Incentives directly link performance with rewards.

- Leadership (Option 1): It's about guiding and inspiring a team to achieve goals. While leadership can motivate, it isn't just about performance measures.

- Motivation (Option 2): This is the inner drive or desire to act. While it involves improving performance, it doesn't always include specific measures or external rewards.

- Communication (Option 4): It's about exchanging information. Effective communication can foster motivation but isn’t a standalone method to improve performance.