Final answer:
Europa is an active moon with an icy surface that hides a deep ocean of liquid water beneath. Its thick ice crust and the gravitational tides generated by Jupiter keep the water in liquid form. Europa, along with other icy moons, may offer a suitable environment for finding life.
Step-by-step explanation:
Europa, one of Jupiter's moons, is an active world with an icy surface that conceals a deep ocean of liquid water beneath a thick ice crust. The planet's massive gravity creates tides on Europa, generating enough heat to keep the water in liquid form. Scientists believe that Europa, along with other icy moons, may harbor liquid water oceans, making it a favorable environment to search for life.