Final answer:
The B. AWS VPC (Virtual Private Cloud) is the component that enables the setting up of a logically isolated section of the AWS cloud, where you can define and control a virtual network environment.
Step-by-step explanation:
The component that helps you set up a logically isolated section of your Amazon Web Services (AWS) cloud is the B) AWS VPC (Virtual Private Cloud). A VPC allows you to create a virtual network within the AWS ecosystem, where you can launch AWS resources in a virtual network that you define. This virtual network closely resembles a traditional network that you'd operate in your own data center, with the benefits of using the scalable infrastructure of AWS.
While AWS Subnets allow you to divide your VPC into smaller, segmented networks to control traffic, they work within a VPC. AWS Regions and AWS Availability Zones encompass geographical locations for launching AWS resources but do not themselves create isolated networks. Thus, the correct answer is B) AWS VPC.