Answer:
They needed new materials.European countries colonized most of Africa. In order to protect their colonies, the European nations began to build large navies and armies. *Hope I helped*
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Answer:
Ecological Validity
Explanation:
According to my research on different research methodology, I can say that based on the information provided within the question this study is lacking in Ecological Validity. This refers to to the extent to which the findings of a research study are able to be generalized to real-life settings. This is because like mentioned in the question this study is addressing a situation that does not happen in everyday life therefore it cannot be generalized to a real-life settings.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
 
        
                    
             
        
        
        
Answer:
“Nothing in the world is as soft and weak as water, and yet in attacking what is hard and strong, there is nothing that can surpass it. 
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Answer:
The mandate of heaven was used as a justification for the ruling of a family or the switch of power to a new family
Explanation:
The mandate of heaven justified that a certain person or family was in power as God desired for them to be in this position of power. However, when power switched or there was a new ruler in power it was justified through the fact that the previous family/ruler/dynasty lost the mandate of heaven, likely through some action that they did, or some even that happened during their reign, like drought
Hope that helped:)