Global warming will cause a change in human technology, as we adapt to the Earth's temperature slowly rising, and we learn new ways to generate cleaner energy. The economy will also continue to progress. As goods and services become more an more expensive, jobs will start paying more as well and more money will need to be printed. Some things will still stay the same though, such as education, work, and social norms.
The correct answer is the last option: If you take away the suffix –n and the prefix un-, the root word is “know”.
Prefixes and suffixes are sets of letters that are added at the beginning (prefix) or end of a word (suffix). They are not words by themselves, but they do change the words' meanings or categories.
In this case, the root is know. The suffix -n is used to change the word's category from verb (know) to noun (known). While, the prefix un- is used to mean NOT. As a result the meaning of the word UNKOWN would be not known or familiar.
5+x
x represents the number, and "more than" indicates that it's addition.
