The infrence that earth has an outer core and inner core is based on studies of? a) Earthquake wave data
b) glacier core samples
c) recent fossil discoveries
d) celestial observations​

b. read the phase at the intersection of any given temperature and pressure.

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.

to this one it would be receptive field