During the process of biological , the concentration of pollutants, such as ddt or mercury, is multiplied as it passes up a food chain . a) diversification b) invasion c) magnification d) multiplication

The increase in concentration of a substance such as toxic chemical in the tissue of an organism at successively higher level in food chain can be refers to as Biological magnification or Biomagnification. It also a process where certain substances such as heavy metals or pesticides find their way into the rivers, lakes or ocean and then move up the food chain in greater concentration as they are incorporated into diet of aquatic organisms.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme