3 - Qual é a origem (país) da maioria dos imigrantes que tentam entrar ilegalmente nos EUA pela fronteira ao sul do seu território?

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks

ask an adult bc this is too hardcore