Why I pick Propulsion Major Crater is because according to Wikipedia,“propulsion stands for the jet propulsion laboratory is where the rover was made.” Major stands for the three major components of Mars 2020 spacecraft are the cruise stage travel between Earth and Mars; the entry, Descent, and landing system that includes the aeroshell , parachute, descent vehicle, and sky line crane; and the rover. Crater stands for the craters on the Mars surface and what the rover will be up against.