Cartilage is a type of connective tissue found in various parts of the human body. It is responsible for providing structural support and flexibility to certain body parts. Option 2, the nose, is indeed correct as cartilage is present in the nose.

Let`s analyze the other options to further understand why they are incorrect:

1) The tongue (option 1) does not contain cartilage. It is mainly composed of muscles.

3) The chin (option 3) does not contain cartilage. It is made up of skin, fat, and muscles.

4) Nails (option 4) also do not have cartilage. Nails are made of keratin, a tough protein.

In conclusion, cartilage is mainly found in the nose, which helps provide structure and support to the nasal cavity.