Explanation:

- Option 1: Delegating authority

- This is part of organizing where tasks and powers are distributed to different levels of the organization.

- Option 2: Designing organization structure

- This is also part of organizing, as it involves creating the framework that defines how tasks are divided and coordinated.

- Option 3: Communication

- Correct Answer

- Communication is a key element of directing. It involves conveying information, instructions, and feedback between managers and employees to achieve organizational goals.

- Option 4: Designing control system

- This relates to controlling which involves setting standards, measuring performance, and taking corrective actions.