Your website suddenly receives 10x more traffic. Which AWS services would you use to keep it running?

I am preparing for AWS and cloud computing interviews and came across this scenario-based question. Suppose a web application suddenly experiences a 10x increase in traffic due to a marketing campaign or viral event. Which AWS services would you use to maintain high availability, scalability, and performance?

I would like to understand:

Which services should be used for load balancing and traffic distribution?
How does Auto Scaling help handle sudden traffic spikes?
When should Amazon CloudFront be used?
How can Amazon RDS or DynamoDB handle increased database load?
Which monitoring tools (such as CloudWatch) are useful during high traffic?
What is a recommended AWS architecture for this scenario?

A practical explanation or architecture diagram would be greatly appreciated.