What type of casting is this? : <p>I'm new in OOP and I'm quite puzzled in casting. Please check the code and declaration below for your reference.</p>

<p><a href="https://i.stack.imgur.com/u4UJc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/u4UJc.png" alt="enter image description here"></a></p>

<p>Then I declared this:</p>

<pre><code>Person[] people = new Person[10];
people[0] = new Learner("John");  // what type of casting is this?
</code></pre>
