"A. The ancestor of the dog." is a fragment. When in doubt, say the sentence out loud and ask yourself if there is enough information for the sentence to make sense.
The main idea will be the one that presents the subject discussed in the paragraph.
<h3>What is the main idea?</h3>
- It is the main subject of the text.
- It is the subject that underlies the events and concepts presented in the text.
The main idea can be identified with the reading of the text, where the reader can see which subject is being discussed and highlighted, being the basis of the entire text.
You didn't show the text to which this question refers, which makes it impossible for me to provide a specific answer, but I hope the above information can help you.
You can learn more about the main idea of a text in the link below:
brainly.com/question/1914191
A: full of significance and purpose
The answer is c. An imperative sentence is a sentence that gives command.
Your answer looks correct!