We are a forest with one r , because forest is spelled with one r . We can see your confusion, vector. It is a figure of speech. Because we are plants and attached to the sediment, we are sometimes called a bed of kelp. And because we have long stalks and grow in groups, we are sometimes called a kelp forest.
Animals have to hunt for their food.
We make our own. The little vector looked puzzled. Oh no, that s what we are here for. We are algae. Or actually brown algae.