Respuesta :
''The length of a day on Mercury is much longer than Earth'' is the right answer.
Daylength on Mercury as compared to earth
Mercury rotates on its axis very slowly due to which daylength on Mercury is much longer than Earth. A day on Mercury is 1407.5 hours long while a day on Earth is 23.934 hours long and its reason is slower rotation of Mercury so we can conclude that ''The length of a day on Mercury is much longer than Earth'' is the correct option.
Learn more about Mercury here: https://brainly.com/question/879