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--instructions--

Read the text and answer the question below.

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--text--

After his conversation with Sophie, Mark decided to write to his mentor David to reflect on what he had learned.

Hi David,

I just wanted to share a quick update. After sitting in on a recent code review, I finally feel like I'm starting to understand some key programming concepts.

Sophie explained terms like polymorphism, encapsulation, inheritance, and abstraction. For example, I saw how encapsulation helps with keeping details hidden and making the code easier to work with. I also noticed polymorphism in a method that changes behavior depending on the input.

I tried writing a small class using these ideas — focusing on clean code structure, reusing properties and methods, and simplifying functionality.

Does it mean I'm on the right track if I can explain these terms and apply them in a simple project?

Thanks for explaining these things over time. I appreciate the explanations and all your support.

Best,

Mark

Which concept does Mark say is about hiding details?

--answers--

Polymorphism

--feedback--

Polymorphism is about changing behavior based on context, not hiding internal code.

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Inheritance

--feedback--

Inheritance is about reusing properties and methods, not hiding them.

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Encapsulation

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Abstraction

--feedback--

Abstraction also hides complexity, but in this sentence Mark is specifically referring to another term.

--video-solution--

3

--explanation--

To choose the right answer, focus on the sentence where Mark talks about keeping details hidden. He describes this as a benefit of encapsulation, so that's the concept he is referring to.