Youth culture is the way adolescents live, and the norms, values, and practices they share.Culture is the shared symbolic systems, and processes of maintaining and transforming those systems. Hope this help you
        
             
        
        
        
Answer:
The navajo celebrates a baby's first laugh.
 
        
             
        
        
        
Answer:
I would go with B, "populations declined in urban areas"
Explanation:
For all 3, the urban population is much greater in 100 CE than 1000 CE. I find the graphs to be set up in a poor way and you'd expect them to have grown, so forgive me if I'm wrong.
 
        
                    
             
        
        
        
One of his accomplishments could be the defeat of Hannibal's brother Hasdrubal. This was at the battle of Baecula all the way back in 208 B.C. and within the next year was able to convince the local people of spain to pledge their allegiance to Rome.
In the battle of Zama he was able to defeat Hannibal through a funny turn of events. The Romans sounded horns that scared the Carthaginian elephants causing them to trample the troops. 
I don't really have a third one off the top of my head but you could look up his military accomplishments since that is what he was known for. He was known for superior military abilities.