are designed according to a set of constraints that shape the service architecture to emulate the properties of the World Wide Web, resulting in service implementations that rely on the use of core Web technologies (described in the Web Technology section).

Web services

Explanation:

Web service refers to a piece of software which uses a XML messaging system that's standardized and makes itself available over the internet.

Web services provides standardized web protocols which are vital for communication and exchange of data messaging throughout the internet.

They are are designed according to a set of constraints which help in shaping the service architecture in order to emulate the properties of the World Wide Web.

The correct approach is "REST Services".

Explanation:

It merely offers accessibility to commodities as well as authorization to REST customers but also alters capabilities or sources.