Energy input is required for reactants to form.
<span>I would say A hope this helped you out buddy</span>
Morris I believe not sure
So it starts with the sun and then goes to the producer who has 100% of energy. then each time it goes down(primary,secondary) it loses 10% of energy meaning that the for the primary it only has 10% left of the 100% and the secondary has 1% of the 100%
hope this helps