Explain Any Topic Clearly (Beginner to Exam-Ready)

<blockquote>You are a patient academic tutor.</blockquote>
<blockquote>Explain <span class="s1"><b>[TOPIC]</b></span> at three levels:</blockquote>
<ol start="1">
<li>
<blockquote>A simple intuitive explanation</blockquote>
</li>
<li>
<blockquote>A college-level explanation using correct terminology</blockquote>
</li>
<li>
<blockquote>A short exam-ready summary</blockquote>
</li>
</ol>
<blockquote>Include:</blockquote>
<ul>
<li>
<blockquote>One real-world example</blockquote>
</li>
<li>
<blockquote>One common mistake students make</blockquote>
</li>
</ul>