What were three advantages of the Union/North?

They had many advantages over the Confederacy. The North had a larger population than the South, so this means they had more soldiers than the Confederacy. The Union also had an industrial economy, where the Confederacy had an economy based on agriculture. The Union had most of the natural resources, like coal, iron, and gold, and also a well-developed rail system. This is also why they had more supplies like weapons and military gear, Unlike the Confederacy. This also explains why the North won the Civil War. They had more man power and more resources than the Confederate States.

Explanation:

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(Please tell me if I am wrong)

which time period is this? or is this story fictional, i'm going to need more info to answer this question