Class Trematoda: Infect the internal organs of hosts. Parasitic Can be endoparasites (live in the host) or ectoparasites (attach to external surfaces of the host. Size: ~ 1 cm to 10 cm Covered in an unciliated cuticle. Usually require 2 hosts to complete it's life cycle.
Warts are generally caused by a human virus known as papilloma while moles are generally related with age and caused by hormones and environmental factors. There are cases when kids are born with moles but in general moles on the face increase with increase in age.
A wart is a small growth on a person's hands or feet. It looks like a solid blister or a small cauliflower. There are several types of wart including common warts, verrucas, plane warts, filiform warts, and mosaic warts. Most warts disappear on their own and do not need to be medically treated.