Select items observed by Darwin in Argentina during his journey on the H. M.S. Beagle that resulted from massive geological changes. a. Deeply eroded rivers with exposed layers of sediment.
b. Raised beaches with exposed layers of sediment.
c. Fossilized bones of extinct mammals.

did you fail the test? xd

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

not only is it colder, it also becomes darker, less salty, and more dense.

the correct answer to this question is #5