1. The style of speech, text, and writing is a set of language means used to express thoughts.
2. There are five main functional styles of speech in Russian: colloquial; art; journalistic; scientific; official business.
3. Letters in the scientific field are compiled for the purpose of exchanging scientific information between people.
The article provides an overview of different writing styles and their features, as well as the structure of letters. The article is written in a clear and concise manner, making it easy to understand for readers with any level of knowledge about writing styles. The author also provides examples to illustrate their points, which helps to make the article more informative and engaging.
However, there are some potential biases that should be noted. For example, the article focuses mainly on Russian writing styles and does not provide much information about other languages or cultures. Additionally, while the author mentions two additional styles (confessional and epistolary), they do not provide any further details or examples about these two styles. Furthermore, while the author mentions possible risks associated with certain types of letters (such as personal letters), they do not provide any further information or advice on how to mitigate these risks.
In conclusion, this article provides a good overview of different writing styles and their features but could benefit from providing more detailed information about certain topics such as additional writing styles or potential risks associated with certain types of letters.