The document defines and discusses explanation text. It begins with the definition of explanation text as a text that tells how and why natural, social, scientific, and cultural phenomena occur. It then discusses the social function, generic structure, and language features of explanation texts. The generic structure includes a general statement, sequenced explanation, and optional closing statement. Language features include using simple present tense, abstract nouns, passive voice, and action verbs. An example explanation text on how rainbows are formed is also included.