Statement I states that bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism. This means that certain substances, such as heavy metals and pesticides, can build up in an organism over time.

Statement II states that large fishes in a pond have a higher concentration of pesticides than planktons in the same pond. This implies that bioaccumulation has taken place in the fishes, resulting in a higher concentration of pesticides compared to the planktons.

Option 1 states that both statements are individually true and that Statement II correctly explains Statement I. This means that the process of bioaccumulation leads to the higher concentration of pesticides in the large fishes, as stated in Statement II.

Option 2 states that both statements are individually true, but Statement II is not the correct explanation of Statement I. However, this contradicts the correct explanation provided in Option 1.

Option 3 states that Statement I is true, but Statement II is false. This contradicts the scenario described in Statement II, where large fishes have a higher concentration of pesticides compared to planktons due to bioaccumulation.

Option 4 states that Statement I is false, but Statement II is true. However, this contradicts the definition of bioaccumulation provided in Statement I and the scenario described