A complete sentence has a complete thought, it contains a subject (it mentions who or what the sentence is talking about) and a predicate (the action the subject does or is). On the other hand, a sentence fragment is incomplete because it only has a subject or a predicate. For the options you have we could say:
1. Kids <u>have played at O'Leary Park for year</u>. This is a complete sentence. The subject (Kids), does the action (<u>have played at O'Leary Park for year)</u>.
2. Even my grandpa when he was young! This is sentence fragment. We know his/her grandpa is the Subject but the thought is incomplete, we don't know what he did when he was young.
3. The city <u>wants to pave over the field</u>. This is a complete sentence. The subject (The city), does the action (<u>wants to pave over the field)</u>.
4. <u>Will make posters to protest and write to our mayor</u>. This is sentence fragment. It is incomplete because we don't know who is going to make poster to protest.
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A large aggregate of people united by common descent, history, culture, or language, inhabiting a particular country or territory
Answer
There are many things can strengthen an argument. Throughout this essay, I will give multiple examples. One example of an argument strengthening topic, is an appeal to authorities. An appeal to authorities is where you appeal to a credible source, external to the argument, in order to prove your point.
Another thing that strengthens an argument is when you sight your sources. To sight your sources is to give a physical or verbal reference to an external source that strengthen's your argument. You should always sight your sources when providing evidence.
Finally, You should support your arguments with valid evidence, backed up with sources and appeals to at least two authorities who can verify your statements As you can see, there are many ways that we can strengthen our arguments. I hope this helps.
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