Answer :
The correct answer that would best complete the given statement above would be physical changes in species. Therefore, the answer would be option B. Here is the complete statement. Changes in the environment result in physical changes in species. Hope this is the answer that you are looking for.
The answer is B. As tectonic plate move, the climate on the continent change (though ever so unperceptively slowly) due to changes in latitude. This change in the environment requires that species of both plants and animals adapt to the new climate. The selection pressures of natural selection will act upon the variations in the population and the best adaptable features will be conserved (while unfavorable traits will be slowly stymied over genrations) in the population hence the genotype and phenotype of the population will gradually change.