Which of the following terms is used for the thick forests of the equatorial region of South America?
A. Llanos
B. Campos
C. Pampas
D. Selvas

Hint: The thick forests of the equatorial region of South America are located in the southern part of Mexico. These forests also include the Chimpala rain forest.

Complete Answer: The Selva is also known as Selva Zoque, the largest tract of tropical rain forest in Mexico. It also includes the Chimpala rain forest. In the state of Oaxaca and a few parts of Chiapas and Veracruz, most of the Selva forest is located.
The tropical rainforest is home to numerous animals such as jaguars, puma, harpy eagle, horned guan, ocelot, etc.
The Selva forest is filled with numerous plant communities. This region has over two hundred species of canopy or thick trees. These trees exceed thirty metres in height.

While talking about other options,
A. Llanos, a wide grassland, found in the regions of northern South America. These are found in Venezuela and northern Columbia. In Llanos, the plant communities consist of savannas and open grassland.
B. The grasslands with less number of trees are called Campos, trees are mainly found near the streams. The Campos are found in the regions of Argentina, Brazil, Uruguay, etc.
C. The Pampas is also known as Cortaderia sellona. This plant belongs to the family of Poaceae.

Thus the correct option is D.

Note: The government of the country, in order to reduce the impact of the development in the nearby places of the Chimpalas, had made certain plans. In the past, the government offered to buy the forest land to turn it into a biosphere reserve. This offer was rejected by the indigenous people.