Question

unique nature of carbon

Answer 1

it attains stability by the formation of covalent bonds only.
it shows the property of catenation [ i.e. self linking property]

Answer 2

Carbon has unique nature due to this carbon form millions of compounds....
The unique natures are :--
1) tetra valency
2)catenation

Tetra valency means 4 valence electron.

catenation is the property of self linking..
carbon has unque nature that carbon can link with another carbon...due to this property carbon forms millions of compounds.....

I hope it will help u.