Poll taxes, literacy tests and threatened violence were all measures that existed in Southern states in order to undermine the content of A) the 15th Amendment. This was due to the South having a hard time coming to terms with the fact that they were obligated to give African-Americans equal voting rights. The above were both harsha and offensive tactics used against former slaves, so that they were unable to vote.
The Middle Colonies were dependent on cash crops.
They can catch fire easily due to the materials that are used to make them
1. malaria 2. rivers had terrible waterfalls..too dangerous...until the steam engine was invented it was incredibly dangerous 3. deserts....they didn't know how to travel through the deserts and find an oasis which made it very difficult to travel through