Match the feature on Mars with

its corresponding description:

1. Olympus Mons - A large shield volcano, the tallest mountain in the solar system
2. Valles Marineris - A system of canyons stretching over 2,500 miles long and up to 7 miles deep
3. Hellas Planitia - The largest impact crater on Mars, over 4 billion years old
4. Polar ice caps - Frozen water and carbon dioxide at the north and south poles of Mars
5. Curiosity Rover - A robotic rover exploring the surface of Mars, launched in 2011