The color of each iguana is an adaptation to its. A) food B) predators. C) habitat D) climate

If there's an all of above then that would be the answer. If there's none, here's your answer:

C.

Because if the forest is green, then the iguana will be green. In most cases this is what happens. Most iguanas that are in the dessert adapt to the sand which is normally brown, so the iguana changes that color.

Hope I answered your question!

Habitat would be your answer