Final answer:
The story 'Space Journey' focuses on the weightless sensation experienced in space.
Step-by-step explanation:
The characteristic of the story 'Space Journey' that is focused on in the given options is B) It focuses on the weightless sensation experienced in space. The passage describes the author's experience of being weightless in space and the amazing sensation it creates. This is shown through the author's description of feeling their body float and drift through the spaceship, and their enjoyment of being weightless for the first time.