Generally the purpose of an explanation text is explaining how something forms or why the thing happens. So when we read an explanation text, the text will cover the answer of "how" or "why" relating to a thing or a phenomenon. An explanation text is organized with the generic structure of a general statement and a sequence of explanations.

saya mau memperjelas, itu bukannya pengertian dari explanation text itu sendiri?
bukan, saya hanya ingin contoh dari text explanation