whichObstacleShouldISkate.js

const options = [
  "quarterpipe",
  "big hubba",
  "small hubba",
  "flatrail",
  "vault",
  "vault gap",
  "stairs",
  "ledge",
  "manual pad",
  "manual pad gap",
  "handrail",
  "pole",
  "ledge with ramp",
  "45 / pyramid",
  "trunk"
]

const sort = (options) => {
  const index = Math.round(Math.random() * options.length);
  return options[index];
}

console.log(sort(options));