I'd say either railroads or wagon trains because airplanes and steamboats are not land travel and wagon trains are a vehicle and railroads are a thing they ride on to guide them
I believe the answer is: Stop
The message 'stop !!' is usually used in a distressful situation where it is necessary to grab the attention of people near you.
For most people, it is easy to get the attention because our voice tend to rise in volume when we say 'stop'. For those who use hand signal, the sign must be really obvious and easy to understand by other people near them.
One disadvantage of liberalism is that it does not support stability as much as conservatism. Stability is beneficial for long-term planning, and additionally can give people a feeling of security.
(there are also a lot of advantages).
Answer:
B. Melbourne is at a lower latitude than St. Louis.
Explanation:
Given that the higher the latitude of a place, (which means that the place is distant from the equator) the colder the region and the lower the latitude (which implies that the place is nearer to the equator) the sunny the region.
Hence, the temperature was much colder (in St. Louis) than it was in Melbourne, because "Melbourne is at a lower latitude than St. Louis."