How does the tenth amendment benefit us today

The 10th Amendment is used every time the state or local government passes a law. It's what gives (in theory) the states broader power than the federal government.

It's also why the state can refuse to enforce federal laws and so the federal government often "encourages" certain laws/policies by threatening to withhold federal funding.

i would think it's industries and hydroelectric power

codfish influenced the yankee trade because they traded it with the americans and the americans traded livestock, molasses and stuff that they can make clothes out of (like wool, and leather). they also could make weapons to.