Prokaryotes do not have membrane bound organelles, but eukaryotes do.
Red tide is a common name for algal blooms, which are large concentrations of aquatic microorganisms, such as protozoans and unicellular algae.
The upwelling of nutrients from the sea floor, often following massive storms, provides for the algae and triggers bloom events
A healthy ecosystem can be described as Resilient (b)
A commonly cited broad definition states that a healthy ecosystem has three attributes:
1)productivity
2)resilience, and.
3)organization
I think it’s A, begins to change :))