Answer:
They have a gizzard to grind the food. 
Explanation:
Birds cannot chew since they have no teeth. However, the beak allows them to split very large seeds or swallow them directly.
For their digestion they have a stomach where digestion enzymes are released. Also they have a gizzard that is an organ that grinds the food mechanically. This gizzard usually has small stones inside that were previously ingested and that helps to digest the food. 
 
        
             
        
        
        
Draw a punnet square:
 R. r.
R. RR. Rr
r. Rr. rr
Any combo that results in an R results in red flowers. 
3/4 offspring have red flowers.
        
             
        
        
        
The greenhouse effect is the trapping of a stars warmth in the lower atmosphere of a planet by gasses in the air trapping the energy. This is similar to what actual greenhouses do, where they trap the warmth and humidity of the air inside it so plants can flourish. Farm animals produce a huge amount of the greenhouse gasses required for our planet to trap the suns warmth.
 
        
             
        
        
        
As part of the water cycle, this process is known as evaporation! :)