There are many fish and other large marine animals in the light zone becuse plankton (a main foodsource for many fish) is able to grow.
Mendel was the first person to succeed in predicting how traits are inherited from generation to generation.
<h2>Answer:</h2>
Option C is correct.
C. 5 kilocalories
<h2>Explanation:</h2>
Only a little amount of energy as 10% is transferred to the next trophic level. This is called 10% rule. So, in this case as the energy available at the secondary trophic level is 50 kilocalories and 10% of it is transferred into the tertiary level so it would be 5 kilocalories.
