Which of the following describes crevice corrosion?
Two metals/alloys of different compositions are coupled while exposed to an electrolyte.
One element is preferentially removed as a result of corrosion.
Corrosion resulting from the combined action of chemical attack and mechanical abrasion or wear.
Localized corrosion that may be initiated at a surface defect.
Oxidation and reduction reactions occur randomly over the surface.
Corrosion that results from a difference in concentration of ions or dissolved gases in the electrolyte.
Corrosion resulting from the combined action of an applied tensile stress and a corrosive environment.
Corrosion that occurs preferentially along grain boundaries.

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.