A statistical and economic theory based on the idea that global oil production has reached a limi and is declining. The first one is the answer
High productivity growth played a key role in postwar economic growth. The highly skilled and educated labor force, extraordinary savings rates and accompanying levels of investment, and the low growth of Japan's labor force were major factors in the high rate of productivity growth.
I don't know if this is one of your options but it is correct
The Bedouins had livestock so they could eat, and animals such as camels and horses for traveling around. They also had wells for water and would occasionally go to the city to get whatever necessities they needed.