Which one is it? WIll mark brainlist

B is the correct answer

Explanation:

because the equation for the potential gravitational energy of an object near the earth surface is

PE =mgh

as both m and g are constants near the surface of the earth, and h is to the first power, P.E vs h is a linear function.

NB.at singnificantly higher elevations, g changes as function of the distance from the center of the earth. As such PE would not be a linear function.

I think C is the answer cuz The higher the altitude, the more energy

a and c

c is 100% but i am confused in a

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000