Which statement is true about the relationship between organs and organ systems? Every organ belongs to a single organ system.
All organs and organ systems are interdependent.
If an organ in one system fails, other systems will not be affected.
An organ system consists of only one organ.

what's the question ?

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.