AWS Elastic Beanstalk is the correct service for this requirement because:

• AWS Elastic Beanstalk is a Platform as a Service (PaaS) offering that allows developers to quickly deploy and manage applications in the AWS Cloud
• It automatically handles the deployment details including capacity provisioning, load balancing, auto-scaling, and application health monitoring
• Developers simply upload their code, and Elastic Beanstalk automatically builds the required infrastructure
• It supports multiple programming languages and platforms including Java, .NET, PHP, Node.js, Python, Ruby, Go, and Docker
• Unlike the other options:
  • AWS AppSync: A managed service for developing GraphQL APIs
  • AWS Config: A service for assessing, auditing, and evaluating AWS resource configurations
  • AWS Outposts: Extends AWS infrastructure to on-premises locations

The key requirement is "upload code to automatically create the application infrastructure," which perfectly describes AWS Elastic Beanstalk's core functionality.