Aplanet similar to earth has four moons roughly the same distance away. the moon that will most affect tides on the planet is the one that has the greatest

Mass

Explanation:

Tides are the rise in the level of water in oceans and seas. Tides occur due to gravitational pull of Moon and the Sun.

If the Earth has four moons, each at equal distance, then the one which has highest mass would have most affect on tides. Greater the mass, greater would be the gravitational pull. Other than mass, the alignment of the Sun, the moon and the Earth would affect the tides. High tides occur when the three are aligned in one line.