Answer:
A] The further along the food chain you go, the less food (hence energy) remains available.
Step-by-step explanation:
This is because, for example a rabbit eats a producer. It eats everything other than the roots. The roots contain energy, but they are not transferred to the rabbit. Energy reduced. Now a fox hunts and consumes on the rabbit. However it does not each its bones and certain other parts. Energy reduced and so on...