Have you ever tried to carry a bunch of things in your hands and they all fall down? That's because they weren't secured properly. The same concept applies to big vehicles like trucks and trains. When they are carrying things like boxes, machines, or even cars, they need to make sure everything is tightly secured so that it doesn't fall off while they are moving.
There are different ways to secure things, but some common methods include using straps, chains, and even nets. These are all used to keep everything in place so that it doesn't move around too much during transport. It's like holding onto your toys tightly so they don't fly away while you're running around.
Load securing is really important because if things fall off, it can cause accidents and hurt people. That's why big vehicles have to follow special rules to make sure they do it right. They have to check the weight of what they are carrying, make sure it's all packed properly, and use the right methods to secure it all.
So, to sum it up, load securing is when we make sure things are packed tightly and held together properly when they are being transported so that they don't fall off and cause any accidents.