Answer / Avinash Pandey

Polymorphism in Perl works by using references and object-oriented programming. An example is using a method on a base class reference that has been initialized with an instance of a derived class. Here's an example:
```perl
# Base class
sub speak {
my ($self) = @_;
print "$self speaks the truthn";
}

# Derived class
package DerivedClass;
use base 'Examples'; # inherits from Examples
sub new {
my $class = shift;
return bless {}, $class;
}

my $obj = DerivedClass->new();
$obj->speak($obj); # prints "DerivedClass object speaks the truth"
```

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