Answer:
Wages paid to workers in car factories
Explanation:
Internal cost are the cost included in the price of a product or good while external cost are third-party cost, they are cost incurred as a result of the use of a product.
Wages paid to workers in car factories are included in the price of the car and as such are considered as internal cost.
In urban areas, there are more people, therefore not a lot of farmland. (that eliminates C) If city buildings don't allow flood waters to recede, that could be dangerous in many ways. (So A is still a reasonable answer) If most cities are built in flood zones, there should be some form of shelter if houses aren't safe. Pollutants and diseases being carried in water are already dangerous, but easier to spread with rapid flood waters that are sweeping everywhere. So your best answer would be either A or B.
Answer: mantle and sillicates
Explanation: