Read this story and use it to answer the question.
"Green Skiing"
Long after most people have packed up their skis, boots, and poles in favor of shorts and swimsuits, some skiiers keep up their downhill skills by skiing on grass.
After being developed in Europe, grass skiing has developed a following in the United States and Canada because it allows skiers to keep in shape year-round for the winter sport. Resort owners are delighted to keep selling lift tickets for skiers who do not depend on new-fallen snow to continue their sport.
Although you might think grass skiing is the very same as snow skiing, a few things are different. First of all, grass skis are only about 2 feet long, compared to the 5 - 6 foot skis used in the snow. Instead of a smooth surface, grass skis have rollers with continuous nylon belts fastened around them similar to the tread of a bulldozer. Grass skiers use bindings, ski boots, and ski poles the same as snow skiers.
Since grass skis do not slide the same way that snow skis do, turning is sometimes more difficult, and skiing is somewhat slower than snow skiing. Skiers ride the ski lift to the top of a hill where they walk through a trough of oil that lubricates the treads and gives them a smoother ride down the hill.
Which of these is an advantage for grass skiing?
Question 6 options:
Turns require higher skill than on snow.
Skiers do not depend on snowfall to be able to ski.
Downhill speed is slower.