Which island country has very high density of population?

United Kingdom

The correct answer is Option (2) → United Kingdom

The United Kingdom has a very high population density, especially in urban areas like London and the southeast of England.

• West Indies refers to a group of Caribbean islands, many of which have moderate to low population density.

• Madagascar is a large island nation off the coast of Africa with relatively low population density.

• New Zealand is sparsely populated compared to the United Kingdom.