Concept:The 'natural method' is another name for the Direct method, which teaches a language without using the mother tongue.Explanation:The Direct method focuses on speaking skills and builds a direct link between words and ideas.It avoids translation and uses the target language directly in the classroom.This approach is called natural because it mimics how a child learns their first language.It contrasts with grammar-translation and bilingual methods, which rely on the mother tongue.Answer:A. Direct method