A company wants a single, consistent tool for interacting with AWS services from the command line. Which AWS tool provides this capability?

The AWS Command Line Interface (CLI) is the correct choice because it's a unified tool to manage your AWS services from the command line. It allows you to control multiple AWS services directly from your terminal, automating tasks through scripts. Amazon Elastic Container Service (Amazon ECS) is a fully managed container orchestration service, not a command-line interaction tool. AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug code, but it's not solely a command-line tool for interacting with AWS services. AWS Virtual Private Network (AWS VPN) is a service that provides secure connections to your AWS resources, not a tool for managing services via the command line.