Dr. Chang is studying seismic waves. He notices that seismic waves (a type known as P-waves) travel faster through the mantle than through the outer core. What can he conclude from this observation?
ОА.
The mantle is wider than the inner core.
ОВ.
The mantle is not as dense as the outer core.
OC.
The outer core is not as dense as the mantle.
OD.
The inner core is wider than the mantle.

d. cellulose and starch

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.