The conversion efficiency from herbivores to carnivores is the least efficient of the tropic levels with an average conversion of

a.

1 – 5%

b.

0.5 – 1%

c.

7 – 12%

d.

15 – 20%

I am absolutely sure that the right answer is the second option represented above. So, the full answer should have had a look like the conversion efficiency from herbivores to carnivores is the least efficient of the tropic levels with an average conversion of b. 0.5 – 1%. This one will definitely help you.