The AWS Well-Architected Framework has five pillars:

1. Operational Excellence
2. Security
3. Reliability
4. Performance Efficiency
5. Cost Optimization

From the given options:

• Reliability is one of the five pillars
• Operational excellence is one of the five pillars
• Availability, Scalability, and Responsive design are not pillars of the framework but may be characteristics or benefits of well-architected systems

The correct answers are Reliability and Operational excellence.