animal.rb

class Animal
  attr_reader :name
  def initialize(name)
    @name = name
  end

  def talk
    "#{name} #{@sound_verb}"
  end

  def self.phyla
    %w[Ecdysozoa Lophotrochozoa Deuterostomia]
  end

  def eat(food)
    "#{name} eats #{food}."
  end
end

interface.rb

# In another Ruby file, create an
# array with Simba, Nala, Timon &
# Pumbaa, iterate over it and puts
# the sound each animal make

require_relative "lion"
require_relative "warthog"
require_relative "meerkat"

animals = [
  Lion.new("Simba"),
  Lion.new("Nala"),
  Warthog.new("Pumbaa"),
  Meerkat.new("Timon"),
]

animals.each do |animal|
  animal.talk
end

lion.rb

require_relative "animal"

class Lion < Animal
  def initialize(name)
    super(name)
    @sound_verb = "roars"
  end

  def eat(food)
    "#{super(food)} Law of the Jungle!"
  end
end

meerkat.rb

require_relative "animal"

class Meerkat < Animal
  def initialize(name)
    super(name)
    @sound_verb = "barks"
  end
end

warthog.rb

require_relative "animal"

class Warthog < Animal
  def initialize(name)
    super(name)
    @sound_verb = "grunts"
  end
end