Explanation:

- Option 1: Education

- Education is a key component of social infrastructure.

- It helps in developing human capital and supports societal growth.

- Option 2: Energy

- Energy is part of physical infrastructure.

- It deals with electricity, fuel resources, and power generation.

- Option 3: Transport

- Transport is also physical infrastructure.

- It includes roads, railways, and other means of mobility.

- Option 4: Communication

- Communication falls under physical infrastructure too.

- It involves telecommunications and internet services.

Correct Answer: Option 1: Education