Explanation:
Box 1: Yes
You can move the Storage Account to RG2, however it stayed in the West US region. You cannot change the Region, you need to recreate the Storage Account.
Box 2: Yes
You can move move NIC1 to RG2 which was associated with VM1 and VNET1 subnet1, however it stayed in the West US region. You can move a NIC to a different RG or Subscription by selecting (change) next to the RG or Subscription name. If you move the NIC to a new Subscription, you must move all resources related to the NIC with it. If the network interface is attached to a virtual machine, for example, you must also move the virtual machine, and other virtual machine-related resources.
Box 3: No
You can move IP2 to RG1, as it isn't associated with any other resource, however it stayed in the East US region. The location will not change.
Note: Resources can be everywhere regardless of the resource group they belong to. The resource group is only a collection of metadata relative to the resources defined inside it. You can move a resource from one resource group to another group. The resources in a resource group can be located in different regions than the resource group.
Reference:
https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/overview