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
Answer:
Very important
Explanation:
Slavery was crucial in Texas since they were counting on them to carry the Economy, the slaves had to grow cotton sice it was the primary income of money during the 1820s.
During the first part of the 19th century, it was mainly "<span>C. the railroad and the telegraph" that</span> revolutionized transportation and communication, since these greatly increased efficiency and speed.
