which of these are characteristics of a formal style when writing an explanatory text? select the three…

Brief Explanations:

Formal writing uses complex syntax to convey ideas precisely. Standard textbook English is the norm as it is widely - accepted and professional. Advanced vocabulary is often employed to show expertise and precision. Slang, contractions, and personal pronouns are generally avoided in formal writing as they are considered too informal.

Answer:

• complex syntax
• standard textbook English
• advanced vocabulary