A hybrid cloud model integrates private cloud resources with public cloud services, allowing for data and application portability. This model provides the flexibility to use the public cloud for high-demand scalability and the private cloud for sensitive, mission-critical workloads, hence, it's the correct option. Option B is incorrect because a private cloud is exclusively used by a single organization and does not typically involve public resources. Option C is incorrect because a community cloud serves a specific group of organizations with shared concerns. Option D is incorrect because it represents a purely public cloud scenario which does not integrate with private cloud resources.