**Composition:**
- **What it means:** Composition involves creating complex objects by combining simpler, smaller objects.
- **Example:** Think of a car. A car "has-a" engine, "has-a" set of wheels, and "has-a" seat. The car is built from these parts rather than being a type of any one part.
- **Key Points:**
- You build objects by combining smaller objects.
- It allows for more flexibility because you can change or swap parts without altering the whole system.
- Ideal for creating modular and reusable components.
**Inheritance:**
- **What it means:** Inheritance is about creating new classes that acquire attributes and behaviors from existing classes.
- **Example:** Consider a cat. A cat "is-a" type of animal. It inherits traits and behaviors from the animal class.
- **Key Points:**
- You extend or specialize existing classes to create new ones.
- Promotes code reuse by sharing common attributes and methods.
- Useful for modeling hierarchical relationships and supporting polymorphic behavior.
**Bottom Line:**
- **Composition** is like assembling LEGO pieces to build something new, offering flexibility and modularity.
- **Inheritance** is like inheriting traits from parents, allowing for code reuse and reflecting real-world relationships.
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