The correct answer to this question would be alternative D)"Developing countries often specialize in manufacturing and providing raw materials, which can seriously harm the environment."
Alternative D precisely describes the problems for the environment in developing countries.
If you take Brazil, for example, there is plenty of natural resources there, and the soil is fertile for many types of crops, including soy, corn, etc. Animal Husbandry is also a successful activity.
All of these need extensive lands, which can cause deforestation, pollution of the soil, air and of drinkable water. Since these are some of the most important industries of the country, and they're partly responsible for the development of the nation, the government doesn't do much to stop or regulate them, since they need these activities themselves.
