Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because

a. a toxic substance accumulated by an organism cannot be metabolised.
b. a toxic substance accumulated by an organism cannot be excreted.
c. a toxic substance is passed on to the next trophic level.

• A

  a and b only

• B

  b and c only

• C

  a and c only

• D

  a, b and c