A student puts a piece of black paper and a piece of white paper in the same sunny spot after 30 minutes she observes the black paper feels warmer then the white paper which best explains the students observation

The black paper feels warmer than the white paper because black objects absorb more light and heat than white objects. White objects reflect most of the light that hits them, while black objects absorb more of the light, converting it into heat. This is why the black paper feels warmer than the white paper after being exposed to sunlight for 30 minutes.