Well, we're alive as we: move, respire, are sensitive, require nutrients, excrete, reproduce and grow. We're also made of Eukaryotic cells which makes us either plants or animals and not bacteria (which are prokaryotes). And we're not green so I'd deffinitely go for the idea of us being animals. Human cells don't contain chloroplasts (an organelle which contains chlorophyll- the green pigment of plants) so that eliminates us being photosynthetic! And one vital difference between us and plants is that we eat our food; plants make theirs. We're also quite high up the food chain; which indicates we're animals.