Which sequence represents a deletion of this section of DNA?

A—C—T—C—G—A—T

A—C—T—A—T

A—C—T—C—C—T—T

A—T—C—T—G—G—A—T

A-C-T-A-T represents the deletion, both C and G are deleted from the sequence

Explanation:

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

to this answer it would be edge enhancement