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Phylogeny, which is used to discover evolutionary connections between species, determines how closely one species is connected to another.

The option of studying evolutionary history is available (c). A species' evolutionary history helps determine its relatedness to other species, which in turn helps determine its phylogeny. As a consequence, choice (c) is the correct response.

Option (a) is offered in the form of a sequence of mutations. Changes in the DNA's base sequence are known as mutations. Although mutations give information about the relatedness of genes, they are not used to determine species phylogeny. As a result, option (a) is clearly incorrect.

Option (b) is also known as DNA. Deoxyribonucleic acid is the genetic substance of most living creatures on the planet. However, it is not directly used to determine phylogeny. As a result, option (b) is clearly incorrect.

Option (d) is defined as organisms that live on the earth's surface. Organism features are used to define the phylogeny and just the organisms. As a result, option (d) is clearly incorrect.

Phylogeny is defined by the evolutionary history of several species. To assess species relatedness as well as linkages between ancestors, evolutionary history is used.