What is a organism that makes their own food?

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

In each transformation of energy , some energy what?

Which of the follow describes a disadvantage secondary sources have compared to primary sources?