What are 4 different ways an island forms?

Answer 1

I know three.

1. erosion do to water cutting away land.

2. change in water level causing high areas of land to crown.

3. volcanic activity forming new land masses.

Answer 2

1. Volcanic activity: Islands can form through volcanic eruptions where magma rises to the surface and solidifies, creating new land.
2. Coral reef growth: Coral reefs can build up over time, eventually forming islands as coral polyps secrete calcium carbonate skeletons.
3. Deposition: Sediment carried by rivers or ocean currents can accumulate over time and form islands, such as with delta islands.
4. Tectonic uplift: Islands can form through tectonic processes where the Earth's crust is uplifted, bringing land above sea level.