input: Write a python function to classify items as either fruit or vegetable.
  assert classify_items(['apple', 'orange'], ['fruit', 'vegetable']) == ['apple is a fruit', 'orange is a vegetable']
  assert classify_items(['apple', 'banana'], ['fruit', 'vegetable']) == ['apple is a fruit', 'banana is a vegetable']
  assert classify_items(['carrot', 'orange'], ['vegetable', 'fruit']) == ['carrot is a vegetable', 'orange is a fruit']
output: def classify_items(items, classifications):
      result = []
      for item, classification in zip(items, classifications):
          result.append(f"{item} is a {classification}")
      return result