Due to the lack of the choices, let me just give you here the definitions of appositional and interstitial growth.
Appositional growth happens when the inner layers of the cell divides into chondroblasts, increasing the cartilage mass.
Interstitial growth happens when the chondroblasts in the cartilage divide to form new small groups of cells.
Answer:
I think Africa should stay the same, it would kinda be odd for it to be a power house :/
The main reason for migration is mostly food: people migrate where they can produce food easily, catch it, or in modern times, to produce money to buy food.
Other reasons is conflict with other people and competition for food: people migrate in the hope that elsewhere they won't have to compete.
Finally, people might also migrate to look for a better climate (where they don't have to built very cold resistible houses for example).
True, emotion is expressed through facial expressions and in words, these words may be interpreted differently based on tone
