Final answer:
The AWS Pricing Calculator is the tool that allows users to explore AWS services and create a cost estimate for the use of those services. It differs from AWS CloudTrail, AWS Config, and AWS CloudWatch, which have other specific purposes such as auditing, configuration management, and monitoring, respectively.
Step-by-step explanation:
The AWS tool that allows you to explore AWS services and create an estimate is C) AWS Pricing Calculator. This tool provides an interface for you to select and configure the AWS services that meet your specific needs and then estimate the costs for using those services.
Unlike AWS CloudTrail, which is used for auditing AWS account activity, or AWS Config, which is a service that enables you to assess, audit, and evaluate the configurations of your AWS resources, the AWS Pricing Calculator is specifically designed for cost estimation.
AWS CloudWatch, on the other hand, is a monitoring service designed for DevOps engineers, developers, site reliability engineers (SREs), and IT managers to monitor their AWS resources and applications in real-time, not to calculate costs. To use the AWS Pricing Calculator, you just need to specify your service requirements, and the calculator will generate a cost estimate, helping you to plan your budget and make informed decisions about which services to use.