B. is the answer.
C is not correct because the light is actually reflected off of an opaque object.
Why the answer to your question is Contour farming I hope this helps add me as a friend and I can help more
Answer:4kg
Explanation:
acceleration due to gravity(g)=10m/s^2
Weight(w)=40N
Weight=mass x g
40=mass x 10
Divide both sides by 10
Mass =40/10
Mass=4kg
Two major characteristics that change when air is heated and cooled is the density and the direction of the air flow. They change the movement of the air by heated air rises and cooled air doesn't.
