Question

Whats the definition of parasitism and commensalism and examples?

Answer 1

Parasitism- is a non-mutual relationship between species, where one species, the parasite, benefits at the expense of the other, the host
examples- plants and animals 

Commensalism- in biology, a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.
examples- egrets and cattle

Answer 2

Parasitism- where one organism benefits and causes harm t the other organism. Example ( tapeworms which live in their host) 

Commensalism- Where one organism benefits while the other organism is not being harmed. Example ( relationship between a sea anemone and clown fish)