Write a letter to a friend about a place where there have been many changes in the environment

Dear Friend,

      A place in which the environment has been changed greatly would be the Amazon rain forest. You see, the Amazon has been used for logging and lumber which is devastating to the environment. It ruins homes to many life forms which causes them to have to more on to different areas. Which then leads to depopulation within the Amazon. Some animals have even became extinct because their habitat and environment have been changed for many different reasons.

                                                                         Sincerely,

                                                                                (Your name)

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.