Which command provides information about the field replicas within the spec resource of a deployment object?

`kubectl get` is used to retrieve actual instances of resources, not to provide schema documentation for specific fields.

`kubectl explain deployment.spec.replicas` is the correct command to retrieve detailed documentation on the `replicas` field, which is nested under the `spec` of a `Deployment` resource. This command is specifically designed for exploring the schema and purpose of fields within Kubernetes API objects.

`kubectl describe` provides detailed runtime information about a specific resource instance, not the schema documentation for a field.

The `kubectl explain` command uses dot notation (`.`) for nested fields, so `deployment --spec.replicas` is syntactically incorrect; it should be `deployment.spec.replicas`.