Answer :
- Develop provider-hosted apps and integrate data sources with the business logic by using OData.
Explanation :
Provider hosted apps are also a part of cloud hosting model, where app can be hosted on any remote web platform such as IIS server. And these apps are made available on deploying it on cloud i.e. using SharePoint online, Office365 site, or windows azure in case of Auto hosting.
It interacts with SharePoint 2013 by using one of the SharePoint client object models or its REST/OData-based web service. Depending on the scenario it gains authorization to SharePoint data using either the SharePoint 2013 implementation of the OAuth standard or a JavaScript cross-domain library.
