Answer:
1. The speaker sees horses and cattles through the meadows.
2. He sees bridges, houses, ditches, meadows and hills
3. He sees a boy who is collecting brambles, a homeless person who is staring at the train and a man who is lifting an overloaded cart.
Explanation: Robert Stevenson portrayed in the poem a picture of a person and the journey of being in a fast train. He describes everything the reader sees, such as the horses and cattles in the meadows, the houses and bridges, a boy who is picking plants, and a homeless person that stares at the sight. He represents the emotion that the person experiencies by looking at everything.