The most appropriate answer is A !!
I don't really understand your statement
The amount of energy that is transferred at each level of the food chain is about 10%. This is called the 10% rule (10 per cent rule).
As humans we can do whatever to gentically modify trees, but trees take over 100 years to grow back, to fix this, we could prevent unessecary tree cutting and plant new trees for the next generations , they're renewable because they can be replenished over a course of time
This is called the Green house effect
