Answer:
C. The moons gravity creates tides on earth, and the earths gravity keeps the moon in place.
A book or electronic resource that lists the words of a language (typically in alphabetical order) and gives their meaning, or gives the equivalent words in a different language, often also providing information about pronunciation, origin, and usage.
(hear: aud) (sea: mer/mar) (see: vid/vis) (water: aqua) (mindful: mem) (to know: sci) (sound: phon) (study: ology)