6 is a Number because it helps associate amounts with a number, like 6 items .
The majority of exports are destined to India, Hong Kong and Bangladesh. Bhutan mainly imports oil and fuels, base metals, machinery and electrical appliances, vehicles, wood and food.
I think the answer is D) reflection of light rays
During the day or with any form of light source available, light reflects off of the human body all of the time so this explains why you are able to see yourself in a mirror. The light reflects off of you and off of the mirror allowing you to see yourself.