What organism is the main producer in freshwater ecosystems?

a. phytoplankton
b. zooplankton
c. anaerobic bacteria
d. none of the above

Explanation:

The eruption sent devastating tsunamis across the eastern Mediterranean that smashed into the Minoans on Crete, at the time one of the world's most advanced civilisations. The Santorini volcano is a caldera, a type of volcano that erupts so violently that its middle collapses in on itself forming a huge crater.

Scientists believe that most of the twelve plagues occurred as a consequence of volcanic activity.

if this was helpful can you mark me as brainlist.