举一反三
The ocean covers about 71% of the Earth and is very important for our lives. It is home to millions of sea animals, from tiny fish to huge whales, and keeps the whole nature in balance. People call rainforests the “lungs” of the planet, but scientists say the ocean provides 50—80% of the oxygen we breathe. It also helps control Earth's climate by moving heat from the equator toward the poles(两极).
The ocean plays a key role in fighting climate change too. It takes in 50 times more carbon dioxide than the air around us, which helps slow down global warming greatly. Besides, many plants and animals in the sea also keep carbon.
One of the most amazing sea plants is seagrass. There are more than 70 kinds of seagrass across the world. It grows in shallow waters of 159 countries on six continents, covering 300,000 square kilometres. That is about the size of Italy, but it is only less than 0.2% of the seafloor(海底). Seagrass is super helpful: it takes in 10% of the ocean's carbon each year, 35 times faster than rainforests. It uses carbon to grow leaves and roots, and keeps carbon even after it dies.
However, this useful plant is now in danger. Rising temperatures, storms, pollution, coastal buildings and overfishing all make the number of seagrass drop quickly.
The UN Environment Programme says a seagrass area as big as a football field is destroyed every 30 minutes. Seagrass is becoming less at a speed of about 7% a year. This is quite worrying for our environment. If we do nothing, some seagrass will disappear completely by 2050.
Solving this problem needs countries to work together. Luckily, people in many places are taking action to protect seagrass.
()36. What will the writer probably talk about next?

A.What people are doing to protect seagrass.
B.Introduce the countries where seagrass is disappearing very fast.
C.Describe the bad results caused by less seagrass.
D.What scientists think of the dropping number of seagrass.