Okay little buddy, so the ocean is like a giant pool of water on our planet, and the cryosphere refers to all the places on Earth where water is frozen like in glaciers and ice caps. Scientists have been studying these places and how they are being affected by the changing climate, which means the Earth is getting warmer because of things people do like burning too much fuel.
The special report is like a big report card that talks about what they found out. They say that the ocean is getting warmer and the ice is melting, which can cause big problems for animals that live there, like penguins and polar bears, and for people who live near the coast.
The report also says that because the ocean is getting warmer, it's making water levels rise, which can cause flooding in some parts of the world. It's important that we try to slow down the effects of climate change by using less energy and doing things like planting trees that can help absorb carbon dioxide, which is a gas that causes the Earth to warm up.
So in short, the report talks about how the ocean and frozen places on Earth are being affected by climate change, and what we can do to help make things better.