It is measured With a barometer
"The exact <span>age of the layers" is the information among the </span>information's<span> given in the question that is provided by absolute dating about the layers of earth. The correct option among all the options that are given in the question is the second option or option "B". I hope that it has helped you.</span>
Most smaller stars don't have a radiative zone. In the radiative zone, the material is hot and dense which enables thermal radiation transfers from the core outward though the Sun. This layer is size dependent therefore smaller stars might not have this zone at all.
