Logic and the use of facts are an effect element for persuasion. Appealing to the audience/reader’s logos is going to get them to listen to reason. Facts and logic cannot be manipulated by emotion, so it makes for a much stronger argument. That is what people will listen to the most.
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Answer:
1. I cannot remember well, but I am sure I <em>have been</em> here for more than ten years.
The past participle of be is been.
2. Sitara was only three months old when her parents <em>relocated</em> to New York.
The past participle of relocate is relocated.
3. By the time they decided to return to India, she <em>became</em> old enough to make her own decisions.
The past tense of become is became.