Answer:
HbA; lowers
Explanation:
The BPG in our blood stands for Bisphosphoglyceric acid. It is known as by its name as 2,3-Bisphosphoglyceric acid. It is present in our blood in the red blood cells. It binds with more affinity towards the de-oxygenated hemoglobin as compared to the  oxygenated hemoglobin.
Hemoglobin in blood delivers oxygen to our tissues moire efficiently. It is abbreviated as Hb. 
Thus BPG binds more tightly towards HbA or adult hemoblobin and which lowers the affinity for oxygen.
 
        
             
        
        
        
Vacuoles are storage organelles that are found in both animal and plant cells. They store food or any other forms of nutrients, they also store waste products so as to protect the contamination of the cell environment. These waste products are sent out of the cell via vacuoles. In plants the vacuoles are larger than in animals. The vacuole provides plant nourishment in the scarcity of water in the external environment hence, prevents the wilting of plants.
 
        
                    
             
        
        
        
 heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee sorry person
        
             
        
        
        
Answer:
B. Stress caused by forces that stretch an area of the crust made the rock to break
Explanation:
From the picture inserted to this problem, we see a unit that has been severely fractured. 
Fracturing results from the brittle deformation of a rock under applied stress. 
- Rock fracturing results in the formation of joints and faults. 
- We can obviously see different sets of joint sets on the body of the rock in the picture attacked. 
- Also, a prominent fault which resembles an extensional fault can also be seen. 
- Therefore, the stress caused the stretch of the area which in turn makes the rock the rock to break.