Answer:
IP addresses are necessary for the internet to function properly because they provide a unique identifier for each device connected to the internet. These addresses are like a street address for a house - they allow data to be sent from one device to another on the internet, by specifying the destination of the data.
Without IP addresses, it would be impossible for devices on the internet to communicate with each other. Imagine trying to send a letter to someone without knowing their street address - you wouldn't know where to put the letter, so it wouldn't be able to reach its destination. The same is true for data on the internet - without IP addresses, it would be impossible to know where to send the data, so it couldn't be delivered to the correct destination.
IP addresses are also necessary for routing data on the internet. Just like a postman uses street addresses to deliver letters to the correct house, internet routers use IP addresses to forward data to the correct destination. This allows data to be sent from one device to another, even if they are located on opposite sides of the world.
In summary, IP addresses are necessary for the internet to function properly because they provide a unique identifier for each device on the network, and they are used to route data from one device to another. Without IP addresses, it would be impossible for devices on the internet to communicate with each other.