In psychology, is temperament innate or acquired?

In psychology, the explanation of whether temperament is innate or acquired is as follows:

Is it innate or acquired? Different organisms have different temperament types. When a child is just born, the first difference that appears is the difference in temperament. Some children are crying and active, while others are calm and quiet.

In addition, we need to pay attention to the difference between temperament and personality: temperament is not good or bad, and it is innate, innate, and difficult to change. Personality is acquired and is easy to change. People with a certain temperament are more likely to form a certain character, and character can mask and change temperament to a certain extent. The plasticity of temperament is small, but the plasticity of character is large.

Human temperament can be divided into 4 types: choleric temperament (excitable type), sanguine temperament (active type), phlegmous temperament (quiet type), and depressive temperament (inhibitory type). Is it natural or acquired? People's temperament can be changed the day after tomorrow. As time goes by and experience deepens, temperament will also change.

So there is no absolute, everything is relative.