The relationship between the yucca plant and the yucca moth shows that the mutual dependence of plants and insects sometimes
has an evolution that is quite elaborate and improbable and such relationships ensure the survival of both species.
Explanation:A. has an evolution that is quite elaborate and improbable and
tense error.We are talking about fact ,hence Simple present is preferable.
B. has quite an elaborate and improbable evolution and
Same as A.C. quite elaborately, and improbably, evolves, so
comma before verb 'evolve' makes sentence structure awkward.Usage of 'So' indicates result/consequence which is not intended here.D. evolves quite elaborately and improbably and that
Correct.
Adverbial modifiers- 'elaborately' and 'improbably' both are correctly modifying verb-'evolve' ....parallelism also proper with ""shows that.." and "that such..."E. evolves quite elaborately, quite improbably, and
Redundant usage of 'quite" comma before and makes the sentence really awkward.
Hence D is the correct answer.