In the the story “What about Robot” the text structure is Description because it describes the parts of the robot and what the robots are used for.That is how we know the story “Robots” is a descriptive story.
In the story “Save The Space!” I figured out that the text structure in the story is Problem And solution .We know this because The animals habitats are disappearing and the effect we could cut back our use of resources. That's how this passage is a Cause and Effect