Continue the Sequences

1. divisibility, electrified, animation, automatic, sequoia
   (increasing number of different vowels)
2. tool, stork, internal, pasta, lightly, flight
   (the letter ‘t’ takes successive positions)
3. tourist, adorned, heaviest, bombing, colour, pool
   (decreasing number of letters between the two matching ones)
4. courage, advice, dowager, toxic, sly, puzzle
   (third letters in alphabetical sequence)
5. abate, anecdote, left, laugh, bijou, tackle
   (successive pairs of consecutive letters (‘ab’, ‘cd’, etc.))