11. Which of the following laws or international agreements limits the free crossing of people over the U. S. and Mexico border?
O the Trade and Border Protection Act
O the Treaty of Mexico City
O the North American Free Trade Agreement
O the Arizona and California Border Patrol Law

within these regions are all the major types of biomes in the world. a biome is a community of animals and plants spreading over an extensive area with a relatively uniform climate. some diverse biomes represented in north america include desert, grassland, tundra, and coral reefs.

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )