Johan August Strindberg, was a Swedish novelist, playwright, essayist and painter. Since childhood, Strindberg had a massive interest in religion, natural science, and photography. As a child, he always longed for a maternal figure due to her mother's bitterness and resentment of his intelligence. Later, after the death of her mother, his father married again with Emilia Charlotta Pettersson. This grew anger in Strindberg.
Therefore, circumstance what caused Strindberg to cut off from his family was due to his father's remarriage after his mother's death.
If the question is about the words "scuttled off" then the accurate answer would be imagery, more specifically, kinesthetic imagery, that is to say, imagery related to the vivid significance of the movement of the crab that implies both a physical gesture that reveals an emotional movement associated to that gesture. In literature, this is called "from motion to emotion". In this particular case, the movement of scuttling off implies that the patience of the crab is about to meet its limits and because the crab does no longer want to be subjected to an uncomfortable situation it translates its emotion into the motion of leaving. Furthermore, the following use of direct speech right after this motion completes the cycle of emotion to motion and then back to emotion.
Nothing is underlined so I can't help you, please comment what is underlined so I can help :)
It makes it meaning full because of the view