You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

At first glance, the rest of our solar system seems to be a pretty barren place - pockmarked worlds with dry surfaces are abundant, and only one - Earth - has visible water. But by peering beneath the surfaces of other worlds, scientists are quickly realising that water may actually be much more commonplace than thought. Nine other worlds in total are now suspected to have some form of subsurface ocean containing far more water than is on Earth - and some may even contain life, according to Nasa. Nasa has released an infographic explaining which worlds in the solar system are thought to have oceans under their surface, such as Ceres, seen here. The distance from the sun is given in AU, which stands for Astronomical Unit - and one AU is the distance from Earth to the sunNasa scientists in California say our solar system is full of waterMoons of Jupiter and Saturn are thought to have oceans undergroundDwarf planets like Ceres and Pluto may also have similar reservoirsWater is important for the search for life - as life as we know it needs it 
 Questions:The water forms because the moon is pushed and pulled by the gas giant _. (A) Earth (B) Nasa (C) Ceres (D) AU (E) Astronomical Unit (F) California (G) Jupiter (H) Saturn (I) Pluto
Output:
(G)