Astudent made the following observations about astronomical bodies. observation 1: the sun rises and sets. observation 2: the stars move daily across the sky. which observation(s) can be explained using the geocentric model? a. only observation 1 b. only observation 2 c. both observation 1 and observation 2 d. neither observation 1 nor observation 2

Option C, Both observation 1 and observation 2

Explanation:

As per the geocentric model, the earth lies at the center of the Universe and all planets, sun, stars and other celestial bodies rotate around the earth.  

It was believed by the people of those days that the sun rotates around the earth  and completes its one rotation in one day. Thus the part of earth which faces the sun, seems to have sunrise while the other part will have the sunset.

Hence, option C is correct.  

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.