What characterizes a chameleon prefix?

A chameleon prefix is defined by its ability to change or adjust based on the initial letter of the root word to which it is attached. This characteristic allows the prefix to harmonize with the phonetic qualities of the root, facilitating easier pronunciation and smoother transitions when the two parts are combined. For instance, the prefix “in-” can modify to “il-” when attached to a root that begins with “l” (as in “illegal”), illustrating its adaptive nature.

This adaptability is what makes choice B the correct answer, as it emphasizes the dynamic aspect of chameleon prefixes in language construction. Other options do not accurately reflect the nature of chameleon prefixes; they either misinterpret their function or provide inaccurate statements about their use in English.