How is an API different from a web application?

Web services (web application) are an API type to be accessed via a network connection. While APIs are application interfaces, this means standardized communication between one application and another application.

Explanation:

Web service is used for communication with REST, SOAP, and XML-RPC.

        While API for all communication styles is used.

The APIs are all web services. Whereas web services are not APIs.The Web application has no lightweight design, needs a SOAP agreement for sending or receiving system information. While the architecture is lightweight, API is useful for gadgets with limited transmission capacities like smartphones.The web application supports the HTTP protocol only. Whereas the API HTTP/s protocol supports: URL Request / Answer Header etc.The web application is not open source, but any customer who contains XML can devour it. While API  is open-source and has a .net framework.

Whree is the graph budd

Ithink it would be c (a word object) not 100% sure though