Answer:
D: 450 calories
Explanation:
450 kilocalories.
Since only 1/10th of the energy that an organism consumes is passed onto the next level of the pyramid, that would mean only 500/10 = 50 kilocalories are passed on, and the remaining 500 - 50 = 450 kilocalories are used up.
Hope this helped!
E. onset of an ice age
