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
Explanation:
In it, he invoked the principles of human equality contained in the Declaration of Independence and connected the sacrifices of the Civil War with the desire for “a new birth of freedom,” as well as the all-important preservation of the Union created in 1776 and its ideal of self-government.
1. there's water in mars
2. mars used to look like earth (surprisingly)
3. life exists in even the most extreme places
4.some ingredients for life already exists in mars
The answer to your question is Northwest