What can happen to sea levels because of climate change?

This passage explains to children how climate change leads to rising sea levels. It describes two main causes: melting ice in polar regions and the expansion of warmer ocean water. The text outlines potential consequences, such as flooding in coastal areas and the submersion of low-lying islands. It also mentions how rising seas might force people and animals near coasts to relocate. By discussing how cities might need to build protective walls, the passage helps children grasp the real-world implications of this aspect of climate change.