Depending on the size of the segment and how long it's been detached from the worm, yes, they can move.
No, an earthworm is not a parasitic worm as far as I know.
A parasitic worm is a worm that feeds on another organism, its 'host'. For example a tape worm. It latches onto the intestine of humans.
Go to a doctor so they can confirm the type of parasitic worm and they should prescribe a dewormer. There are some over the counter treatments for other types of worms but not tapeworms.
Yes, that is true.
they are consumer or predators and they are parasitic like tapeworms and flukes
This is not an idiom. They mean that someone literally has a tapeworm inside their intestines. It's a parasitic organism.
No. Arthropod literally means jointed leg, and worms don´t even have legs ;) Arthropods are animals like insects, spiders and crustaceans. Tape worms are flatworms or Platyhelminthes.
Planarians are free living and not parasitic. Other classes of their phylum, including flukes and tapeworms, are parasitic when they live inside another organism.
It's a parasitic relationship.
Roundworms and tapeworms, among many others.
Yes, tapeworms are common parasitic flatworms