input: Write a function to select and print a random element from a given list of strings. The function should take one argument, which is the list of strings, and return a string that is the randomly selected element.
  assert random_selector(["apple", "banana", "mango", "pear", "grape"]) in ["apple", "banana", "mango", "pear", "grape"]
  assert random_selector(["red", "green", "blue"]) in ["red", "green", "blue"]
  assert random_selector(["Python", "Java", "C++"]) in ["Python", "Java", "C++"]
output: import random
  
  def random_selector(lst):
      return random.choice(lst)