Question

which of these is an example of a biased source?
an article with quotations from diverse thinkers on a political issue
a debate that presents both sides of a controversial issue
an editorial that only gives the writer’s opinion on a timely topic
a primarily fact - based article for an academic journal

Explanation:

A biased source shows partiality, presenting only one perspective. An editorial giving only the writer’s opinion lacks balance, unlike the others: the first has diverse quotes, the second presents both sides, and the third is fact - based.

Answer:

an editorial that only gives the writer’s opinion on a timely topic