Final answer:
The service that provides a logically isolated section of the AWS Cloud for launching AWS resources in a virtual network is Amazon Virtual Private Cloud (Amazon VPC).
Step-by-step explanation:
The AWS Cloud service that provides a logically isolated section of the AWS Cloud, where organizations can launch AWS resources in a virtual network that they define, is C. Amazon Virtual Private Cloud (Amazon VPC). This service allows you to provision a private, isolated section of the Amazon Web Services (AWS) cloud where you can launch AWS resources in a virtual network that you control. You have complete control over your virtual networking environment, including selection of your own IP address range, creation of subnets, and configuration of route tables and network gateways.