A DaemonSet runs one copy of the Pod on each node in the cluster is correct because the startup needs exactly one log collection agent per host.

A DaemonSet guarantees that the Pod is scheduled on every node and it will add or remove the Pod automatically as nodes join or leave the cluster so you end up with exactly one agent per node.

Horizontal Pod Autoscaler is wrong because it adjusts the number of Pod replicas based on metrics such as CPU or custom metrics and it does not enforce one Pod per node.

StatefulSet is wrong because it is designed for stateful applications that need stable network identities and persistent volumes and it does not ensure a Pod runs on every node.

Cluster Autoscaler is wrong because it scales the number of nodes in the cluster based on pending Pods and resource demands and it does not control Pod placement to guarantee one Pod per node.

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