Figure out the word that connects the following three items
Whale, Dolphin, Shark
The word that connects the three items is "mammal". dolphins and whales are marine mammals, while sharks are marine animals but not mammals, they come with a different group of classifications called chondrichthyes since they possess cartilaginous skeletons.
Complete the following task based on the instruction and optional input provided.### Instruction:
Figure out the word that connects the following three items

### Input:
Whale, Dolphin, Shark

### Output:
The word that connects the three items is "mammal". dolphins and whales are marine mammals, while sharks are marine animals but not mammals, they come with a different group of classifications called chondrichthyes since they possess cartilaginous skeletons.