There can be numerous challenges but the biggest are sickness, lack of proper food and drink, increase in pollution in the area, and increased death due to these factors, Hope this helped! ^-^
c is the answer just relearned this because of stupid people
The layers of the Earth in order are:
1.) Moho Barrier
2.) Mantle layer with more convection
3.)Mantle layer with less convection
4.) Core
What are the choices to choose from
<span>It helped establish transatlantic trade routes to the Americas.</span>
