Which explains how the moon causes high tides on the earth?
a.
the moon's gravity pushes on the earth. the push indents the earth's watery envelope and creates tidal bulges. where the water is pushed in is high tide.
b.
the moon exerts a gravitational pull on the earth. the pull stretches the earth's watery envelope and creates tidal bulges. where the water is thinnest is high tide.
c.
the moon exerts a gravitational pull on the earth. the pull stretches the earth's watery envelope and creates tidal bulges. where the water bulges out is high tide.
d.
the moon's gravity pushes on the earth. the push indents the earth's watery envelope and creates tidal bulges. where the water is pushed out is high tide.