Final answer:
The restoring force for a tsunami wave is gravity, while the generating force can be an earthquake or other disturbance. Tidal forces from the Moon and Sun influence Earth's tides, and Earth exerts an equal and opposite tidal force on the Moon according to Newton's third law.
Step-by-step explanation:
The generating force of a tsunami wave is usually an earthquake, landslide, or volcanic eruption, while the restoring force that shapes the wave as it travels through the ocean is gravity. This is because a tsunami wave, much like other oceanic waves, is subject to gravitational pull, which seeks to flatten out the distortions caused by the initial event. In contrast, the oscillation observed when a liquid splashes can be considered to be due to both potential energy and kinetic energy, though the direct answering choice for the restoring force would indeed be gravity, which acts to return the water to its undisturbed level.
Regarding tidal forces, Earth's tides are significantly influenced by the tidal forces from the Moon and, to a lesser extent, the Sun. As the Earth exerts a tidal force on the Moon, the force is not greater than that of the Moon on Earth; they apply equal and opposite forces on each other in accordance with Newton’s third law, although their effects are different due to the differences in size and the presence of liquid water on Earth. The tide-raising forces contribute to the formation of tides in Earth's oceans by moving water towards the areas where the gravitational pull is strongest.