Inherit Behaviors from a Supertype

Tell us what’s happening:
I do not understand this function:

function Animal() { }

Why is it empty?

Your code so far

function Animal() { }

Animal.prototype = {
  constructor: Animal, 
  eat: function() {
    console.log("nom nom nom");

// Add your code below this line

let duck; // Change this line
let beagle; // Change this line; // Should print "nom nom nom"; // Should print "nom nom nom" 

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Link to the challenge: