Question

3. How do logical fallacies weaken a writer's argument?

They represent the writer's opinion rather than details that readers will recognize as facts.
They attempt to manipulate a reader's emotions rather than presenting evidence.
They make the writer's argument seem biased toward a particular point of view.
They provide false reasons in support of a claim, making the writer seem less credible.
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Answer 1

Answer: the last one is right :)

Step-by-step explanation:

Answer 2

They provide false reasons in support of a claim, making the writer seem less credible.

Step-by-step explanation:

The use of fallacy is using faulty arguments to support the opinion. At the first glance, the fallacious opinion can seem better than it is, but it is not supported by facts, and the reader can have the feeling the writer is dishonest.

By using fallacies, the writer is discrediting his work and words.