Which code snippet demonstrates encapsulation?

1. [ ]
   class Cow extends Animal {
   private $milk;
   }
2. [ ]
   class Cow {
   public $milk;
   }
   $daisy = new Cow();
   $daisy->milk = “creamy”;
3. [ ]
   class Cow {
   public $milk;
   function getMilk() {`
   return $this->milk;
   }
   }
4. [x]
   class Cow {
   private $milk;
   public function getMilk() {
   return $this->milk;
   }
   }

Correct Answer:

• [x]
  class Cow {
  private $milk;
  public function getMilk() {
  return $this->milk;
  }
  }