Help me plzz i need help with this I don't know what is is

This is an organism. We know it is an organism because it is a live animal. An organism is however made up of cells, tissue, and multiple organ systems. All these things make up an organism, which is what a Water Flea is.

So the answer that you are looking for is D, organism.

Hope this helps :)

huge paws help them run ... Eye color is another trait that wolves and dogs don't share.