If it killed the top level of an ecosystem it would damage the whole ecosystem because it's connected. An organism depends on that top organism which would mean that is that organism dies it would affect the organism that depends on it.
The answer is A
This is because 90% of energy is lost when we go up one trophic level. This means that even the the consumers tend to be larger in size, they are fewer in number and need to eat more in order to sustain themselves.
Correct order is: organism, population, community, ecosystem, biosphere.
Most of the infrared radiation to the Earth is absorbed and transmitted towards the Earth's surface.
