We have been studying the channels on Mars. Based on the evidence
that we have viewed and collected in class, ______ most likely caused the channel to form.
![We have been studying the channels on Mars Based on the evidence that we have viewed and collected in class most likely caused the channel to form class=](https://us-static.z-dn.net/files/da8/1d3a353f6530488bb35e0e484b710908.png)