Which technique for realistic acting is referred to as the way in which a performer can transform her thoughts and imagine herself in virtually any situation?

Realistic Acting - Any professional artists portrays the character in such a way that it looks more realistic and original that audiences are made to get into the story and just watch the character believe the artist as it was just him going through the different phases of the story.

Explanation:

A Technique known as "Stanislavski's techniques", according to which the artist portrays the character in such a depth that the characters features and personality is gained by the artistic, as the audience watching forgets about the artist playing the role but thinks more of the character, as the story moves forward with time.