A major challenge of creating health information systems using data from many different sources is the feature known as ""interoperability."" The solution applied to achieving interoperability has been the development of:

Answer:Health information exchanges (HIEs)

Explanation: Health information exchange (HIE) is the department that is responsible for the medical facilities, healthcare activities, etc in the electronic form for the transmission.

These medical data are seen by the government agencies, medical-related organization and other such bodies. Thus the interoperability feature is created by this organization for the exchange of the information/data related with the medical field.