▶ Your Answer :
The reading passage contends that the roles of Lambeosaurus' crest can be fully explained by three theories. On the other hand, the lecturer brings up several points that contradict this argument. First, the speaker argues that Lambeosaurus would not use its crest in order to mate. This is because Most of large animals attract their potential mate by making sound. The lecturer gives an example of large animals that entice its mates by making low noise while raising up its head above the water. This casts doubt on the reading passage's claim that crest is a proper method for their mating. Second, according to the lecturer, it is not possible that crest serve as a weapon used when they combat. This is because the mammal moves forward when they fight. However, its crest is forwarding to back. In addition, as we know, crest is small. Thus, it could not defend and attack their large enemies. This refutes the reading passage's assertion that crest were used for combat. The final point made by the lecture is that crest did not function as air storage. The reason is that a massive animal need abundant oxygen. However, because of its small size, crest could not have contained a large amount of air. This counters the reading passage's argument that Lambeosaurus was able to breath by crest. |