Burning a candle is a chemical change. what is the primary evidence that burning the candle is a chemical reaction?
a) change in odor
b) change in color
c) formation of a solid
d) temperature change

A chemical reaction is one in which there is a chemical change of at least one of the interacting chemical components to another component. In the case as the candle burns, it uses up Oxygen in the air for combustion and transforms it in its carbonized version like carbon dioxide. This change shows that it is a chemical change.

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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