Ans: The ruins of two ancient cities, Harappa and Mohenjo-Daro (both in modern-day Pakistan), and the remnants of many other settlements, have revealed great clues to this mystery. Harappa was, in fact, such a rich discovery that the Indus Valley Civilization is also called the Harappan civilization.
Steam was used for boats and trains, making cleaner, faster transportation.
Answer:
it's b if I'm wrong sorry
<em>On the Origin of Species</em> was a book written by Charles Darwin regarding the observations he made on his trip to the Galapagos Islands.
Hope that helped =)
