Question

which is the best way to complete the text? while it is true that some species of chameleons have the ability to change their skin ________ typically use this attribute to regulate their body temperatures—not to elude detection. color they color, they color; they

Explanation:

The first part "some species of chameleons have the ability to change their skin color" is a dependent - like clause setting up the context. A comma is needed to separate it from the main clause "they typically use this attribute...". A semicolon is incorrect as it is used to separate two independent clauses of equal importance, and "color they" makes the sentence grammatically incorrect.

Answer:

color, they