Answer the following question given this paragraph: 

The surface of Mars has volcanoes and canyons. There is a polar ice cap and channels that were once filled with water. Curiosity has found evidence of a flowing stream.


Q: What two structures are found on mars?

 Choices:

- geysers and canyons

- Mountains and Creeks

- Trees and Canyons

- volcanoes and canyons

A:
volcanoes and canyons
