Possession of flagellum is not a taxonomic feature. many different unrelated organisms have flagellum. euglena, zooflagellates but also some fungi or even human sperm cells.
It would decrease as their prime food source would be taken away. This would result in a decline in population as the birds wouldn’t have sufficient food.
Hope that helps. :)
The answer is c which is Chlorophyll.
2, 4, 1, 3, 5
the tiles go into the sequence in that order.
first one is tile 2, second is tile 4, etc.