Areas with mountains is the answer
<span>it was a source of food and trade</span>
I’m not sure exactly what you’re looking for, but the US spent $15m dollars and gained 54% of Mexico’s pre-1836 territory. There’s a nice article on Wikipedia called ‘Mexican Cession’ that seems helpful. Hope this is helpful :)
An example is the president vetoing a law that Congress passes. He can refuse to sign a bill.
