Answer:
Leif Eriksson
Explanation: Half a millennium before Columbus “discovered” America.
The correct answer is A. Technological advances such as s<em>team power, air brakes, automatica lubricators and steel tracks</em> have affected the railroads very positively, since it has made it possible that the rail network could become a safer, more efficient and more reliable means of transportation for goods.
What are some other unforeseeable factors besides getting sick that can set people back into extreme poverty?
<h3>Contributing factors :</h3>
- Lack of access to exercise.
- Mental stress.
- Contaminated water.
- Inadequate education.
- Inadequate sanitation.
- Poor nutrition.
- Poor housing conditions.
- Lack of access to health services.
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