Answer B did this a few ago
        
             
        
        
        
Drilling for fossil fuels.
This is because the main fossil fuels are not typically found in the rainforest. To also back up this claim, use the process of elimination.
The last choice, demand for rainforest products, is obviously incorrect as that would mean expansion into the rainforest to gather said products.
Shortage of food sources wouldn't be the correct answer either as food sources aren't typically found in the rainforest among popular demand and food can be shipped into the country as well. 
Overcrowding in cities would also lead to expansion, where to can differ based on location but to rainforests or anywhere surrounding the area would be preferred or desirable.
Hope this helps!
        
                    
             
        
        
        
Dark Energy explains:
How groups of objects function together, and also to keep the universe expanding
Hope this helped.
        
             
        
        
        
The compliments bases for DNA are TAGGTC
Whereas the complimentary bases for RNA are UAGGUC
        
             
        
        
        
Answer:
the heart rate will increase just googled it