Answer:
english? maybe i could help u
Explanation:
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: trenches. WW1 is famous for its trench warfare- a dangerous form of warfare that resulted in a lot of deaths as stalemates lasted for months.
Answer:
antipollution laws and local zoning laws
Explanation:
hope this helps have a good night/day :) ❤