" A research concerning plants says that flowers species/specially express their sadness" what's more correct?

This is a grammar exercice.


We should pick either species or specially.


what do u think ?

FlowersBirthday FlowersSympathy FlowersI don't think that the sentence as a whole is very cohesive.





It would read better like this -


"A research project concerning plants says that many different species of flowers express their sadness"





Although having said that my sentence isn't really very fluent either. Is it only flowers that express sadness and is it only sadness that they express?loan