Fast! : ) which line from the text shows that the plesiosaur theory is unlikely?
of all the mysteries in the world, none has been as popular as that of the loch ness monster.
the loch, or lake, is known for sightings of a mysterious monster.
first, the plesiosaur is an air breather.
with cell phones and digital cameras, one would think that sightings of nessie would increase.

"First, the plesiosaur is an air breather." is the line from the article that best disproves the plesiosaur theory. In the article, the author argues that because plesiosaurs were air breathers, they would need to come up for air more frequently than any sightings ever occur. As there are so few "sightings" every year and supposedly fewer now than ever, it is unlikely that Nessie is a plesiosaur.

("age" 51) i think this is it