Question

consider the following research topic:
how the gut microbiome works
which book would likely include the most relevant information about this topic?
a gutsy microbiome: the trillions of bacteria in your gut that work hard to keep you healthy
let there be light! the marine microbiomes that illuminate the darkest parts of the ocean
eyebrow mites and other creatures that are part of the skins microbiome

Explanation:

The research topic is about how the gut microbiome works. The first book, "A Gutsy Microbiome: The Trillions of Bacteria in Your Gut that Work Hard to Keep You Healthy", focuses on gut bacteria and their role, which directly relates to the gut microbiome. The second book is about marine microbiomes, and the third is about the skin's microbiome, so they are not relevant to the gut microbiome topic.

Answer:

A. A Gutsy Microbiome: The Trillions of Bacteria in Your Gut that Work Hard to Keep You Healthy