5. Why are estuaries important to human beings? Estuaries provide both recreation and education for human beings. People can fish, swim and have fun on the beach. Scientists and students have endless opportunities to study a variety of life in the habitat. Estuaries also contribute to the economy through tourism and fishing.
variety
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Writing
If you are describing a process, You should explain each step in the order it happens. Tell the readers about the causes and effects and use words like first, second, then, etc to show the order of the steps.
Read the passage and answer the following questions.
Scanning
4. Why are estuaries more sensitive to pollution than other areas? Because estuaries act as filters(过滤器), many pollutants end up in them.