Does the moon or sun have the greatest impact of earth? and why?

While the sun and moon both have tremendous impacts on earth, the sun definitely has the greater impact.

Explanation:

This is because while the moon's gravitational pull has a great effect on the ocean and tides, the sun literally heats up the planet to the exact inhabitable degree, as well as makes up our day/night schedule

the sun

Explanation:

if the sun dies everything dies with it