Pls
at least me understand the concept

White shark/ Great white shark/ bull shark/
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The white shark underwent emends amounts of pressure and couldn't swim that way with the rest and the others that made it turned into great white sharks, there genes changed with fusion. thus creating a new species when they'er genes were separated. Bull sharks are in a pod some die from other sharks some live, the faster stronger ones, reproduce and bread better sharks, thus changing characteristics and population.

Oi oi oi oi oi oi  i think it is true

Its d because a mechanical wave have a medium physical requirement