The train would need the greatest amount of force due to weight! If you think of it, a baseball won't need much force to stop it, but if you have a heavy train, it will need excessive force to stop the train. The answer would be #3
I hope this answer helps!
Sorry if it doesn't make sense, as I don't know that much about physics! I am just thinking of what makes sense.
A, B and C are all correct. They can be made from igneous, sedimentary or other metamorphic rock. I hope I’m not too late to answering!
Answer: Its the first answer.
Explanation: