Great! Let's break down the information step-by-step:
1. Which of these events can happen when galaxies collide? The answer is "Galaxies merge."
2. Which is the Milky Way? The Milky Way is a galaxy containing Earth.
3. Which galaxy will collide with the Milky Way in several billion years? The answer is the Andromeda Galaxy.
So, to summarize:
- Galaxies can merge when they collide.
- The Milky Way is the galaxy containing Earth.
- The Andromeda Galaxy will collide with the Milky Way in several billion years.
I hope this step-by-step breakdown helps! Let me know if there's anything else I can assist you with.