PLEASE ANSWER ASAP (15 POINTS AND WILL MARK BRAINLIEST)

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Which beat describes the brain stem

What element is able to combine with itself and hydrogen to form large molecules ?