He applied his skill in engineering to toughen up the defence
        
             
        
        
        
Answer: I think the unknown substance is water.
Explanation: mark me the brainly-est
 
        
                    
             
        
        
        
Answer 1: The differences between Homo Habilis and Australopithecus were the following: Australopithecus resembled the great apes unlike Homo habilis, which had a more human body. On the other hand, Homo habilis used tools such as carved stones and Australopithecus did not use any tools and had a lower cranial capacity.
Answer 2: Differences between the two species. The Cro-Magnon man had a nomadic and sedentary lifestyle, had a greater capacity for socialization and communication and possessed a greater adaptation to changing climatic conditions. In contrast, the Neanderthal man had a completely nomadic lifestyle, his life expectancy was much less than that of his successor and they did not have a plan for the distribution of resources.
 
        
             
        
        
        
Answer:
Her response is an example of saving face. 
Explanation:
Saving face refers to maintaining one's status after a failure, in order to avoid embarrassment which in turn would lead to that person <em>"losing face". </em>
The classmate viewed her no selection as a failure, since she has been practicing for weeks to make it on the team. As such, she is embarrassed by  the result and lies by mentioning the sickness in order to save face in front of you, the inquisitor. 
 
        
             
        
        
        
No
You need to be educated to make smart choices which leads to progression