Answer:
The functional group present in Cinnamon are : Aromatic , alkene , aldehyde
The functional group present in Almonds : Aromatic , aldehyde
The functional group present in DHA : Ketone , alcohol
Explanation:
<u>Almond :</u>
Chemical formula : 
It contain : A benzene ring (Aromatic) , a -CHO group (aldehyde)
<u>Cinnamon Sticks</u> :
Chemical Formula : 
It contain : A benzene ring (Aromatic) ,an alkene group (C=C) , a -CHO group (aldehyde)
<u> </u><u>DHA:</u>
Chemical Formula : 
It contain : Alcohol group (-OH) , ketone group (C=O)