Water which looks clean still has disease carrying ________ and ________ impurities.
(insects, microorganism, particles, dissolved, harmful).

Explanation

To answer the question, we need to identify the types of impurities that can be present in water that appears clean but may still carry diseases.

1. **Understanding the Question**: The question states that clean-looking water can still contain disease-carrying impurities. We need to fill in the blanks with appropriate terms from the options given.

2. **Identifying Impurities**: The options provided are: insects, microorganism, particles, dissolved, and harmful. We need to think about which of these can be present in water that looks clean.

3. **Microorganisms**: The first type of impurity that can be present in clean-looking water is "microorganisms." These include bacteria, viruses, and other microbes that are too small to be seen with the naked eye but can cause diseases.

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