The correct answer is option 2. Chronometer.
Root words are the original or parent words which when added with a suffix or prefix would result in a new word with a different meaning. Suffix or prefix are the words added after and before the root word, more like added 'accessories' to the parent word.
- The word "chrono" which means time is from the Greek word "chrónos".
- The suffix "meter" means "measure" in Greek.
- Now, if we add these two together, we get a new word "chronometer" which is a device used to measure time.
The addition of prefix or suffix to a word results in a new word with a different meaning. And with that, the conjunction of 'chrono' and 'meter' formed "chronometer" which means "a device for measuring time". Thus, the correct answer is option 2.
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