Why is the prey just moving for the frog?

A frog, and a cat reacts to everything that moves, since this is its main food, like a cat has a mouse. This is a natural feature of the frog and, as already mentioned, this is due to its diet. Eat a grasshopper, fly, dragonfly – and the ability to react to them accordingly, so as not to miss and gorge on. Caring nature could not leave the tiny frog hungry, so it made it so reactive to everything moving. This is how things stand with the frog’s reaction – everything is natural.