You land in the water! (How does one LAND in WATER?) Aside from the semantic issues, impacting the water at 120 mph (your terminal velocity in a spread-eagle posture) is as likely to result in death as hitting soft soil or hard rock. The course of action that you need to follow is to avoid hitting anything at 120 mph. That is accomplished by deploying your emergency or reserve chute. Before you deploy the reserve chute you must cut away the failed chute so as not to get them entangled. Safety begins on the ground where you pre-flight all of your gear and receive appropriate training. If you are planning to hit the water, be sure to, right before you hit, straighten your body and enter feet first with your legs crossed. That will keep your legs from being folded up around your ears.
A parachute allows a person to jump out of a plane and land safely on the ground. A disadvantage is that (rarely) a parachute may fail to fully open and injury and death is likely.
A parachute would open ABOVE Mars, just as it would above our planet
parachute is opened to provide air which manages the slow chute
Likely
Well if your falling u have to press the a button to open your parachute
Try pulling the emergency cord. Otherwise get another parachute
There is no air in the moons atmosphere so a parachute would not open.
Death
Jumping to a conclusion
maybe by pulling on the string?
When he or she wants the parachute to open
It is called a drogue chute and it stabilizes the jumper and pulls the main parachute out of the container or pack.