One of the most significant challenges is building an airplane had to do with "propulsion", since the technology that allowed motors to have enough energy to lift an airplane into the sky with a passenger wasn't available for most of history.
Well, as the population of the world increased more people could fill job positions, decreasing the need for a person to learn more than one skill. This allowed for more people to focus one industry to advance. Hope it helped, could you give me a brainliest?
4. Farming lands that was owned by someone else
Answer:
d.
Explanation:
D .the companies charges with tax fraud were generally family owned and based in one state
