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PLEASE HELP WITH BOTH QUESTIONS!!
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DDT decreases as it moves up in a food chain.

Explanation:

DDT decreases if we look at a food chain. DDT obviously decreases as you go up the food chain, meaning at every feeding event the next trophic level is getting less and less of the pesticide.

In the table, you see that the concentration of DDT in Herbivores is 9ppm (parts per million) but the Primary Carnivore (eating the herbivore) has a concentration of 7ppm, which means the next trophic level is consuming less biomass.

answer; /// i believe the correct answer is (reactants);

i believe the answer is c