Answer:
A bio-war,
Step-by-step explanation:
A bio-war, which is short for Biological Warfare, is far more dangerous for the world than a world war. This is the case because countries can use tactics, weaponry, and equipment to protect and defend themselves against a world war since they can see the attack, understand who their enemy is, and prepare. There is no preparation for a bio-war. The weapons being used infect a single individual which can cause a chain reaction that infects millions within a matter of days. This kind of weapon cannot be seen until it is too late and cannot be controlled once it is released. Many times, the countries that would use such a weapon do not necessarily have a cure for the disease that they have created which can ultimately destroy entire countries, or even the world if not careful.