However, I can provide a response in English.

Chapter 6 of Science for Class 6 covers the topic "Changes around us." This chapter discusses the different types of changes that occur in our surroundings and their causes. Here is a breakdown of the chapter:

Types of Changes:
- Physical changes: Changes that do not alter the chemical composition of a substance. For example, melting ice or cutting paper.
- Chemical changes: Changes that alter the chemical composition of a substance. For example, burning wood or cooking food.

Causes of Changes:
- Natural causes: Changes that occur naturally, such as the changing of seasons or the growth of plants.
- Human-made causes: Changes that are caused by human activities, such as deforestation or pollution.

Effects of Changes:
- Positive effects: Changes that have a beneficial effect on our surroundings, such as planting trees or cleaning up pollution.
- Negative effects: Changes that have a harmful effect on our surroundings, such as cutting down forests or releasing chemicals into the environment.

Ways to Reduce Negative Effects:
- Recycling: Reusing materials instead of throwing them away.
- Conservation: Protecting natural resources and using them wisely.
- Alternative energy sources: Using sources of energy that do not harm the environment, such as solar or wind power.

In conclusion, this chapter teaches us about the different types of changes that occur around us, their causes, and their effects. It also emphasizes the importance of reducing negative effects and taking steps to protect our environment.

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