When a pollutant is removed from the air by a natural process distrupts natural processes ends up elsewhere is gone forever causes chemical reaction

For the answer to the question above,
When a pollutant is removed from the air by a natural process it will just end up Elsewhere

Which makes the answer B.
I hope my answer helped you somehow. Have a nice day!

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.

Although i don't know what is the simulated system, starfish are predators that eat mostly  microalgae,  snails, sponges, bivalves, mussels and other small marine animals. removing starfish from any system would definitely increase this animals that they prey.