What is parasitism? Give two examples in which the host is harmed. What is a predator? Give two examples.
What is prey? What animals would be considered prey of the two predators that you mentioned?

Parasitism is defined as a relationship between two species in which one organism (parasite) lives on or within the other organism (host), causing the host some degree of harm. A parasite reduces its host's fitness but increases its own fitness, usually by gaining food and shelter.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.