Early in the twentieth century, the siberian tiger was added to the endangered species list. in the modern era, however, the population is declining rapidly. fewer than 500 tigers remain in the wild. which word indicate that this passage is from the historical text.

Aslender threadlike object or fiber, especially one found in animal or plant structures.

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form