How is the amount of sunlight absorbed by earth's surface and the amount of energy released by earth kept in balance?

I say a lot of sun light gets absorbed into the atmosphere by my calculations it a lot to a little bit more  

Explanation:

The absorption of infrared radiation trying to escape from the Earth back to space is particularly important to the global energy balance. Energy absorption by the atmosphere stores more energy near its surface than it would if there was no atmosphere.

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complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

i think the answer would be d