Which method allows a project to access another project's resources in a multicloud environment?

The method that allows a project to access another project's resources in a multicloud environment is the Shared VPC. With a Shared VPC, resources can be shared across different projects within the same organization. This is especially useful in large enterprises where multiple teams or departments might need access to central shared services like databases, applications, or other network resources without needing to duplicate these resources in each individual project.

Shared VPC is designed for scenarios where organizations want to maintain a centralized network and security model while allowing different development teams to work on their own projects. This setup offers benefits such as streamlined management of IP addresses, security policies, and network traffic.

VPC Peering, although a method of connecting two VPC networks, typically relates to direct network communication between two separate VPCs and may not directly correlate with accessing resources across different projects in a multicloud setup. Cloud Interconnect and Cloud Router serve different roles in connecting cloud networks, primarily focusing on connectivity and routing rather than resource sharing across projects.