Why is this the answer?

The answer is electricity because this clever riddle describes something that is all around us, but we can't see it, and it does so many amazing and powerful things for people. It is a puzzle that helps you think about the energy that runs our modern world. Let's look at the first clue: "I drift forever with the current down these long canals they’ve made." When you look closely at this, think about the wires that stretch from power plants to your neighborhood and all the way into the walls of your home. These copper wires are exactly like tiny "canals" that electricity flows through, always moving and drifting without stopping. Electricity is truly the flow of tiny, invisible particles called electrons, and they follow the path of the wire forever to get to your devices. Next, the riddle says, "Tame, yet wild, I run elusive." We use very special machines called generators at power plants to capture and "tame" electricity, making it safe for us to use in our homes. This controlled flow lights up our rooms and runs our video games. But, if you look up and see a flash of lightning during a big storm, that is electricity in its powerful and "wild" form. It is a natural force that we can control, but only when it stays carefully inside the wires. "Elusive" means it is hard to catch, which is true because it is invisible and moves so fast. The line "Multitasking to your aid" is a great way to describe its many jobs. Electricity does many things at once: it turns on the stove to cook dinner, it keeps your ice cream frozen in the freezer, and it charges your phone and tablet. Finally, the last part tells us about its strength: "Before I came, the world was darker, colder, sometimes, rougher, true. But though I might make living easy, I’m good at killing people too." Before people figured out how to use electricity, life was much harder, without lights or heat from our wall sockets. But because electricity is so strong and moves with such force, it can be very dangerous if you ever touch a bare or broken wire. This is why we must always respect electricity and never play near power lines or electrical outlets. Its amazing power makes living easy, but it must always be handled with great care.