There isn't a simple answer. Arthropods are a large family and make up about 80% of all known species. Examples of arthropods are spiders, crabs, and centipedes. Each obtain food in a different way....
No, an arthropod is any invertebrate animal having an exoskeleton.
they eat many things especially since most of them are bugs
They eat dead or living organic material, such as leaves or small insects.