Question

what is unique about europa? it is jupiters largest moon. it is made of rock and ice. it may contain liquid water beneath the surface

Explanation:

Europa is a moon of Jupiter. While some moons are made of rock and ice (common in outer - solar - system moons), and Ganymede is Jupiter's largest moon. Europa's uniqueness lies in the scientific evidence (such as magnetic field data and surface features) suggesting the presence of a subsurface ocean of liquid water. Liquid water is a key factor in the search for extraterrestrial life.

Answer:

It may contain liquid water beneath the surface.