Nathan’s Explanation:

The water takes away all the sand to make a drop off. Then the waves bash at the sand to make erosion.When the roots have no more sand to hold on to and the palm tree falls into the ocean .then dose the whole cycle again.and makes a new beach that terns into a sand island.

Dylan’s paragraph:

Erosion in the San Blas islands is caused by water. It all starts when when the wave comes in and pulls back the sand to create a drop off which makes the beach have quite a big slope. With the added effect of climate change as the world is heating up the glaciers are melting letting tonnes of water into the ocean causing the ocean levels to rise.

In the San Blas case as their islands are very low to the water the water rises above the beach and reaches the palm trees. As the waves come and hit the roots of the palm tree it makes an under cut in the roots and the palm tree ends up loosing its holding on the ground and falls into the sea, speeding up the erosion process as it takes some land with it. The whole cycle repeats until it eventually takes away all the palm trees on the island and causes it to become a sand island, which is then super small and will easily erode and will soon be under the water.