Ships.  
Sea transportation was just right at that time as it can carry loots, spoils of war , enough fire power to conquer new colonies, and also food and necessities for sojourners ,seafaring soldiers and traders. Even exploration of unknown territories was also done with the help of sea transportation.
        
             
        
        
        
Answer:
The answer is below
Explanation:
The are various reasons people had for not sending girls to school. Some of which were:
 1. Schools would hinder them from doing their household chores, such as sweeping, washing, and cooking. 
2. Schools would expose them to public places without the guidance of their parents. For example, moving through public places to reach school. 
3. Some believed schools would take girls away from home and thereby, they might lose them to societal dangers.
 
        
             
        
        
        
It was the "oil crisis" that was one major cause of the recession in the United States in the 1970s, since many countries in the Middle East cut prices to manipulate prices. This put a focus on alternative energy sources that continues today.