The lower mantle has an average density of 5.5 g/cm³ which of the following could be density of the outer core?
a 3.5 grams per cubic centimeter
b 5.5 g/cm³
c. 10.0 g/cm³
d no text answer provided

The correct answer is option A,

Reason - The density of outer core is less than the density of inner core density and thus among all the given options the more probable answer is option A

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.