c.midrib. The petiole is a stalk arising from the stem of the plant that connects the stem to the leaf blade. In the middle of the leaf blade is the midrib, which is an extension of the petiole.
        
                    
             
        
        
        
Answer:
One building block
Explanation:
The prefix mono means one
 
        
             
        
        
        
It is important because you need vitamins and minerals from them e.g. Scurvy no vitamin c
        
             
        
        
        
It’s a place that has lots of fish and they catch a lot fish there.
        
             
        
        
        
Soil in cooler climates would most likely be well developed and have Lots of organic matter . 
Hope it helps !! :)