In this type of writing the authors main purpose is to inform the reader about a topic. which type of text is this

 Non-fiction or factual texts, writing in a expository way.

Explanation:

Non-fiction or factual texts include a wide range of texts in many forms. They can be: discussion texts, procedural texts, explanatory texts, persuasion texts, non-chronological reports or reccounts. In these type of texts, writing in a expository way wants to inform the readers about facts. Its aim is not to persuade or influence them. Descriptive writing can inform too, but it goes deeper describing many items for the audience to experience.

physical, emotional, intellectual, spiritual, social and environmental