Answer:
Tribunes
Explanation:
The laws made by its 10 tribunes became the laws that all Roman citizens - no matter if they were patricians or plebeians - must follow. As impressive as those improvements appeared to be, plebeians never managed to outdo patricians.

The United States have represented form of democracy.
Thanks
Answer:
The main challenges to sustainable development which are global in character include poverty and exclusion, unemployment, climate change, conflict and humanitarian aid, building peaceful and inclusive societies, building strong institutions of governance, and supporting the rule of law.
Railroads would bring lots of people to stockyards.