The Sun is the primary source of energy for Earth's climate system is the first of seven Essential Principles of Climate Sciences. 
Principle 1 sets the stage for understanding Earth's climate system and energy balances.
 The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible.
 
        
             
        
        
        
The difference is because there about different from one another, the reflexes will act different towards the speed
        
             
        
        
        
To me, this sounds like the Garter Snake is becoming more immune to this toxic chemical.
        
             
        
        
        
Your answer is C.) The hydrogen bond between complementary nucleotides
Those rectangles are nucleotides, and the nucleotides are held together by hydrogen bonds.
Hope this helps!