Abook review would be considered
a. a primary source.
b. a secondary source.
c. a tertiary source.
d. either a secondary or tertiary source, depending on content.

B. a secondary source.

Explanation:

A secondary source can be define as the source which can be created by someone who write as a review or summery for the first hand document which is generated after research outcome or the original piece of writing.

This source analyzes and interprets the primary source. This source consists of journals, articles, histories, encyclopedias and books.

A book review will be considered in the secondary source as this can be written by the person who is actually not the writer of the book but gives the insight of the notion of the book and it's summary by studying the book.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation:

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.