The correct option is kubectl apply -f frontend.yaml.

kubectl apply -f frontend.yaml is the declarative command that reads the manifest file and creates the resources if they do not exist or updates them if they do. The command sends the desired state to the Kubernetes API server so the cluster can reconcile actual state to match the provided manifest.

kubectl create -f frontend.yaml is incorrect because create only attempts to create resources and will fail if the resource already exists. It does not perform an update of existing resources the way apply does.

gcloud deploy apply frontend.yaml is incorrect because it is not a standard kubectl command and it is not the correct way to submit Kubernetes manifests to a cluster with kubectl. The gcloud CLI uses different commands for Google Cloud services and is not the direct replacement for kubectl apply.

kubectl replace -f frontend.yaml is incorrect because replace requires the target resource to already exist and it performs a full replacement. It will not create missing resources and it does not provide the same declarative merge behavior that make apply suitable for rollouts.

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