Which of the following is a word root?

Options:
A basic word part that often comes from Greek or Latin
A affix added to the end of a word root
An affix added at the beginning of a word root
A word part added at the beginning or end of a word root that changes the words meaning

A basic word part that often comes from Greek or Latin

The correct option is: A basic word part that often comes from Greek or Latin.

The correct answer is:

A basic word part that often comes from Greek or Latin.

To determine the correct answer, it is important to understand the definitions of each option.

1. A word root is a basic word part, usually derived from Greek or Latin, that carries the core meaning of a word.
2. An affix added to the end of a word root is called a suffix. A suffix modifies or changes the meaning of the word.
3. An affix added at the beginning of a word root is called a prefix. A prefix also modifies or changes the meaning of the word.
4. A word part added at the beginning or end of a word root that changes the word's meaning is called a combining form or a combining vowel. It is used in medical terminology to connect word roots and suffixes or prefixes.

Based on these definitions, the correct option that represents a word root is the first one: "A basic word part that often comes from Greek or Latin."