Explanation:

- Option 1: Saturn

- Saturn is famous for its beautiful rings.

- It has many moons, like Titan and Enceladus.

- Europa is not a moon of Saturn.

- Option 2: Uranus

- Uranus is a unique gas giant that rotates on its side.

- Moons of Uranus include Titania and Oberon.

- Europa is not one of these moons.

- Option 3: Jupiter

- Jupiter is the largest planet in our solar system.

- Europa is one of its four largest moons, called the Galilean moons.

- Known for its icy surface, Europa might have an ocean underneath.

- Option 4: Mars

- Mars has two small moons, Phobos and Deimos.

- Europa is not a moon of Mars.