Ais a group of letters that have a particular meaning which appears at the beginning of a word.

root word
suffix
prefix
base word

The correct answer is "prefix."

Thus, the complete sentence is:

A prefix is a group of letters that have a particular meaning which appears at the beginning of a word.

The prefixes are affixes that form words from a morpheme that precedes the radical. Thus, they modify their meaning but, generally, maintain the grammatical class to which they belong.

the answer is c, because they are being narrated.

the best practice

1. keep your workspace clean

2. wash your hands

3. seperate and clean chemicals and equipment

4.   use microfiber cleaning utensils

5. clean and sanitize all work surfaces

hope this !