Scripts are commonly used to automate the deployment and configuration of cloud resources, ensuring speed and consistency in setting up environments. 'Automating the establishment of virtual networks' is correct because scripts can be leveraged to configure network settings across cloud platforms. 'Manually initiating data backups' is not typically a script-based activity since scripts are designed for automation, not manual processes. While 'Enforcing compliance regulations' may involve automated processes, the enforcement policy itself is not a deployment task fulfilled by scripts. 'Configuring physical network devices' is generally not done by scripts in a cloud context, as such scripts are primarily focused on virtual/cloud-based resources.