In the article, the author states the theory of the plesiosaur is not logical:

so from a purely logical stand point, the existence of such a large and ancient creature is unlikely.

how does the author imply that other theories besides the plesiosaur are most likely not true? use evidence from the text to support your answer.

hjsdhfgfi hfw gf uhwef iwefhuiewg ieufg is aokawfiua

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).