A speaker uses logos to persuade the audience when adding points of emphasis to appeal to emotions.
relying on credible sources to strengthen an argument.
showing how evidence and ideas are linked together.
using a passionate tone to support an important point.

Relying on credible sources to strengthen an argument

Showing how evidence and ideas are linked together

Explanation:

The terms logos, ethos, and pathos refer to the three rhetorical appeals defined by Aristotle, who is considered to be the father of rhetoric.

When a speaker relies on logos, they are using logic and objective evidence to appeal to the audience. This can be done by using information that can be fact-checked, information from credible sources. Someone who uses logos will support their claims or ideas by evidence. For example, if we are trying to convince someone that the global warming is getting worse, we will have to provide evidence and explain how our idea and the evidence are linked together.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."