The correct answer is A. Earth
Explanation:
A root word is a word by itself which can be combined with suffixes and prefixes to create new words, thus root words cannot be shortened but by adding other words or letter before or after them new words are created by mixing the meaning of the root word and the word, syllable or letter added. The words geology, georgic and geode have a common root word which is geo and which is combined with different suffixes such as -logy, -ergic and -de to create new words. The root word geo derives from Greek and means earth, ground or land, as mentioned before the root word is combined with suffixes to create new meanings in this way -logy means the science or study of something which means geology is the study of earth or land; -ergic means produce by, which means georgic is a poem produced or inspired by land (agriculture ) and the suffix -ede means separation which is links to geode definition which is a formation of rocks. Thus, the root word geology, georgic, and geode share is "geo" which means Earth.
The answer is D.
There is no single topic sentence within this piece of writing. A topic sentence is used to summarize what is going to be, or what has been written about, and there is no such sentence within this piece.
