A financial institution uses cloud services hosted by third-party providers and accessed over the internet. Which deployment model describes this?

The correct answer is Public cloud. A public cloud deployment model involves cloud services offered by third-party providers over the public internet, making them available to anyone who wants to use or purchase them. This matches the scenario where a financial institution uses services hosted by third-party providers and accessed over the internet. Hybrid cloud is incorrect because it combines public and private clouds, which isn't fully described here. Private cloud is incorrect as it refers to cloud services used exclusively by a single organization, which doesn't fit the "third-party providers" aspect. Community cloud is incorrect as it involves cloud infrastructure shared by several organizations with common concerns, which is not implied by the description.