what natural boundary form the border between the united states and mexico?

Rio Grande!!

Explanation:

Rio Grande separates Texas from Mexico.

Additionally, Texas used to be part of Mexico but America took it over kinda. Just wanted to let you know.

So since Texas is a part of America, Rio Grande technically separates America and Mexico.

Please consider this answer for brainliest answer.

Hope this helps you!

answer:

explanation:

it is often classified as either a schedule ii or schedule iii substance, making it illegal to possess for personal use or distribution. crystal meth can be ingested, injected, or smoked. it is a highly addictive substance and can lead to many different personal, medical, and legal problems.