The word part that joins a root word and another word part is a _____.Worth 1.000 points.A.   root wordB.   prefixC.   suffixD.   combining vowel

To answer the question regarding the word part that joins a root word with another word part, let’s break down the options:

1. Root Word: This is the base part of a word that carries its primary meaning. It does not join with other parts.
2. Prefix: This is added to the beginning of a root word to modify its meaning but does not serve to join.
3. Suffix: This is added to the end of a root word, also modifying its meaning but not functioning to join different parts.
4. Combining Vowel: This is typically the vowel, often "o", that is used to join a root word with another root or suffix in medical and scientific terminology.

Given this breakdown, the correct answer to the question is option D. combining vowel. This part is essential for forming complex words in medical terminology, facilitating the flow from one word root to another.