Which of the following statements best describes the Sun and the Milky Way? The Sun is a medium-sized star near the edge of a disc-shaped galaxy called the Milky Way.
The Sun is a dwarf-sized star near the edge of an irregularly-shaped galaxy called the Milky Way.
The Sun is a giant-sized star near the center of an elliptical galaxy called the Milky Way.
The Sun is a medium-sized star near the center of an elliptical galaxy called the Milky Way.

barometer is an instrument used to measure the atmosphere's pressure. the high air pressure relative to average levels is associated with calm and sunny weather. on the other hand, low pressure is associated with bad weather, high winds, and rain. 

i believe the answer is pupils are unequal and non-reactive

the pupil of both eyes has different size, so you could say the pupil is unequal. pupil has muscle that makes it able to constrict itself according to the light intensity. when the doctor direct their flashlight to the eye, pupil should be constrict to reduce the light intensity. if the pupil doesn't change their diameter, it is called unresponsive.