The organism nearest the bottom of the food chain that would contain the LEAST amount of a chemical that bioaccumulates and biomagnifies when compared with the other groups is the producers (plants).
Here's why:
1. Producers, such as plants, are at the base of the food chain. They typically absorb nutrients and chemicals from the soil or water, but they are less likely to accumulate high levels of toxins compared to organisms higher in the food chain.
2. Primary consumers, which feed on producers, may accumulate some of the chemicals present in plants, but since they are lower on the food chain, they generally have lower concentrations of bioaccumulated chemicals compared to secondary consumers.
3. Secondary consumers, being higher up in the food chain, tend to accumulate a higher concentration of chemicals that bioaccumulate and biomagnify. This is because they consume organisms (primary consumers) that have already accumulated chemicals from their food sources.
In conclusion, producers (plants) would contain the least amount of a chemical that bioaccumulates and biomagnifies when compared with primary consumers and secondary consumers due to their position at the base of the food chain.
