Question: Which one of the following is responsible for Europa's Global Water Ocean underneath its thick icy crust? Question Answer a. Tidal Heating by the Sun b. The extremely hot core of Europa keeps the water in its vicinity at very high temperatures and thus allows a global water ocean underneath the icy crust AND Tidal Heating by Jupiter c. Particular minerals in the icy crust make the crust extremely opaque and thus absorb 100% of the Sunlight d. The extremely hot core of Europa keeps the water in its vicinity at very high temperatures and thus allows a global water ocean underneath the icy crust. e. Tidal Heating by Jupiter