Answer: Metal rust
Explanation: Because its changing color
Working in low wage . I believe
The huge amount of people in China that migrating internally towards the cities is because of two main reasons:
1. The cities in China have developed immensely and offer lots of opportunities; the Chinese cities have developed significantly from all aspects, they offer lots of opportunities, bigger wages, better life, and the chance for prosper.
2. The rural areas of China had not experienced any significant development and mostly stagnate; the rural areas of China have remained mostly poor, the opportunities are limited mostly to working in agriculture, they have stagnated in time unlike the urban areas of the country, the income is very low, and prospering into this environment is extremely difficult and usually limited to only certain individuals.
I believe c.tariffs enabled the north's manufacturers to compete with foreign manufactured goods
