Which of these is a cost of recycling aluminum?

a. preserving earth's remaining aluminum reserves b. disrupting tropical rain forest plants and animals c. producing wastes that are toxic to animals
d. using energy to transport a heavy metal

Option (C) is the correct answer.

Explanation:

When we refine or recycle aluminium then it results in the formation of red mud which is actually a toxic industrial waste.

Therefore, this industrial waste when drained goes into the rivers, lakes, sea etc. As a result, it causes harm to both plants and animals because animals drink water from lakes, rivers etc.

Whereas this water which is contaminated by red mud is absorbed by the soil also. Therefore, it harms the plants.

Hence, we can conclude that producing wastes that are toxic to animals is a cost of recycling aluminum.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely