What is the most likely reason the Spanish flu receives so much attention, both from the author of this article and from the
scientists studying it?
O because it killed so many people

It resulted in a very high death rate.

Explanation:

The disease affected 200 to 700 million people and killed around 21 million people. The death toll was high compared to that of war.

It extended for 36 months. The mortality rate of young adults was high. among 20 to 40-year-olds.

There was no vaccine to protect against influenza infection and no antibiotics to treat secondary bacterial infections associated with influenza infections.

control efforts like isolation, quarantine, personal hygiene, use of disinfectants, and limitations of public gathering were also uneven.

answer: the correct answer is b. an essay that connects the writer's experience with a topic of significance and of reader interest.

explanation: the key words are here "personal experience" since personal essays give insights about peoples' experiences in life and introduce us in their unique world that can be or not to related to our lives but interests us because we are human beings and share the same condition universally.  

in the thematic approach, an interpreter relies on a central theme (i.e., a major point or message) to guide development of a communication activity or device. in presenting the activity or device, the thematic interpreter develops the theme in such a way that it will be highly relevant to an audience.

explanation: