Which is TRUE based on the map? Migrants kept moving southward to warmer climates.
⊝

Migrants crossed immense glaciers along their route.
⊝

Migrants made it as far south as Mexico.
⊝

Migrants stayed together throughout the migration.

Answer erosion,oil spills,pollution,tourism,urban development;

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.