Which of the following statements is true? O Extinction speeds up the evolution of other species.
Earth has only experienced one mass extinction in its history.
Speciation is caused by a reduction in gene flow.
Genetic diversity can be increased by genetic drift.

because he works for   ,he delets stuff and makes sure every one is following the rules.

have a nice day , give if i earned it, good luck.!

explanation: the line "to save the day, harry must get past a scary three-headed guard dog" from the summary best justifies the conclusion that harry potter and the sorcerer’s stone was influenced by ancient greek mythological literature. the three other choices had nothing to do with ancient greek literature - and the words "three-headed guard dog" are what makes that choice the correct answer.