What accounts for similarities and differences between an account of a single event?

Explanation:

In a firsthand account, the person writing a text is a part of the events. The passage is written using words like “I” and “we.” The author may include his or her feelings and thoughts on the subject.

Secondhand account

In a secondhand account, the person writing a text is not a part of the events. The events the author describes have happened to someone else. The author mostly includes information and facts on the subject.

When comparing and contrasting two passages, look for:

The most important point in each text

The most important details in each text

The ideas only found in one text and not in another

Whether a text has more facts and details or feelings and thoughts

Whether a text uses the pronouns “I” or “we”

the answer is mass marketing.