Hey there! I'm happy to help!
A translation is just when they are staying the same. You just move the figure along but it doesn't switch the way it is facing.
A reflection is when it is like going over a mirror. It's kind of like it rolls over. So if you are facing left on the ground and you roll over then you are facing the right. That's basically what a reflection is.
A rotation is pretty self explanatory, it's when you twist it sideways, upside down, etc. A rotation can also end up in the same position as a reflection. For example if you diagonally reflect something it is the same as a 180 degree rotation, and that might be what is stressing you out.
With your answers, I'm assuming each number has all three possible answers, so if one seems to have both, just see which answer you haven't used yet.
1) Rotation, Translation Reflection
2) Rotation, Reflection, Translation
3) Translation, Rotation, Reflection
4) Rotation, Reflection, Translation
5) Reflection, Rotation, Translation
6) Reflection, Rotation, Translation
Have a wonderful day and keep on learning! :D