It is evidently clear from the discussion that ontology concept discusses the existence of cabbages and apples. For example, Douglas Adams uses his Madagascar experiences to explain how the concept of evolution. Further, ontology focuses on why the above categories exist. Specifically, ontology delves into the reasons why dogs, cats, humans and other animals were placed into our material world. Next, the study of ontology includes determining the significant purpose of the existence of vegetables, fruits, and other plants. Answering the first ontology topic, the person’s describing the physical features and actions shows the existence of the dog, cat, human or other animals. Hearing an animal that barks definitely shows the dog exists. Seeing the animal’s long hair Seeing an animal that has two arms, two legs and speaks Spanish shows a human exists. Seeing an animal gallop indicates the existence of the horse. Next, ontology zeroes in on the reasons for the existence of the above living things. Observing the dog will show that the dog exists to ward off the cat’s intrusion into the dog owner’s home. Likewise, the dog exists to safeguard the dog owner’s car from trespassing thieves. Observing the cat in its own free environment shows the cat exists to eat rats and mice. Eating the rats and mice reduces the pests’ population. With lesser population, people are assured of lesser rodent attacks. Delving into ontology’s existence topic, authentic thinker Albert Camus espoused the philosophical concept of Existentialism. Existentialism states that each individual uses his or her existence or experiences as the basis for generating the individual’s own philosophies, values, and concepts. People use their preferred philosophies, values, and concepts to add meaning to their existence. Further, different individuals go through different paths add meaning to their lives. A hungry individual can generate meaning in his life. First, the individual observes how another person cooks food. Next, the individual uses the observation to cook the individual’s food.