Explanation:

- Option 1: Osmium

- Osmium is a dense metal with a bluish tint.

- It has the highest density among naturally occurring elements, around 22.59 g/cm³.

- Correct Answer

- Option 2: Zinc

- Zinc is a bluish-white metal used mainly for galvanizing iron.

- Its density is significantly lower than osmium, around 7.14 g/cm³.

- Option 3: Nickel

- Nickel is a lustrous, silvery-white metal used in alloys.

- Its density is about 8.90 g/cm³.

- Option 4: Mercury

- Mercury is a heavy, silvery liquid metal at room temperature.

- It has a density of approximately 13.55 g/cm³.