a) encodingStyle é atributo do elemento SOAP:ENV
https://www.tutorialspoint.com/soap/soap_encoding.htm
b) Every WSDL 2.0 document has a description element as its top-most element. This merely acts as a container for the rest of the WSDL 2.0 document, and is used to declare namespaces that will be used throughout the document.
c) schema está dentro do elemento types
d) One WSDL description element may contain zero or more binding elements as its direct children.
https://www.w3.org/TR/2004/WD-wsdl20-primer-20041221/#basics-getting-started
e) A business entity represents an organization or group of people responsible for a set of services (a service provider).
https://docs.oracle.com/cd/E11036_01/alsr30/registry/usr_guide/usr.srintro.spec.html