The correct word would be transport because the other words are different forms that would not make sense in a sentence. People wouldn't say: The school arranged for a minibus to transportation all the students to and from the museum it's just not proper grammar. I hope this helps!
Because a lamb is seen as being innocent. For example would you prefer a lamb or a wolf. When you think of a lamb you think of soft, white, fluffy, cute animal that could do no harm. Innocents.
