Which two objects have a stronger pull of gravity?
a. two small stars very far apart
b. two very small stars close together
c. two very large stars close together
d. one small star and one large star very far apart
,

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.