Which of the following is the definition of the word prefix?

Question

an affix added at the beginning of a word root
an affix added at the beginning of a word root

an affix added to the end of a word root
an affix added to the end of a word root

a basic word part that often comes from Greek or Latin
a basic word part that often comes from Greek or Latin

word part added at the beginning or end of a word root that changes the word’s meaning