Read the following text about language skills.

“Language skills are the abilities that enable you to express your thoughts coherently and communicate with others. These skills provide structure and relevance to the information you wish to convey to the recipient. There are four essential skills that comprise basic language competency. While communicating, people usually use a combination of these skills simultaneously. Choosing the right skills usually depends on various factors, such as the urgency of the message, the number of people targeted and whether it is a formal or informal communication.”
Adapted from: https://in.indeed.com/career-advice/resumes-coverletters/language-skills

The four language skills referred to in the text are: