The moon dictates the length of the day, the rhythm of the seasons and the stability of earth. Without it the day would be a lot shorter (6-12hrs) and there could be more than 1000 days in a year!
I think the correct answer from the choices listed above is option B. With regards to environmental changes, they may affect several populations in an ecosystem because it is where living organisms dwell and they try to adjust accordingly to these changes. Hope this answers the question.
