Which of the following is a cost of mining aluminum from new bauxite deposits in tropical areas? a. preserving remaining aluminum reserves. b. transporting a relatively heavy metal. c. threatening rain forest organisms. d. producing toxic salt cake.

The correct answer is - C. Threatening rain forest organisms.

The mining of the aluminium from the new bauxite deposits in the tropical ares of the world unfortunately lead to the destruction of the rain forests and the organisms living in them.

In order for the mining to take place, the area needs to cleared from the rain forest. Also, roads need to be made in order for the ore to be transported, and to make roads, lot of rain forest needs to be cleared, again. The mines and the rods will be on a very large area, thus the destruction of the rain forest being on a large scale, and because the environment will be destroyed, lot of species of flora and fauna will become threatened. Also, the mining results in pollution, mostly in the rivers, thus affecting the organisms in the rivers as well.