NOT EXACT DEFINITION: Diseases that can be passed from one living organism to the other. Two examples are flu and several STIs (such as herpes). Sorry I couldn’t think of any more :)
        
             
        
        
        
Answer:
can you please provide the name of this leaf...
 
        
             
        
        
        
Plates collide causing rock to push upward together
        
             
        
        
        
Sympathetic nervous system is activated in this situation.
This branch of nervous system is activated when any individual encounters stressful or dangerous situation.This is responsible for 'fight or flight' response.
It takes place by activating adrenal gland which releases specific hormones adrenaline and nor adrenaline also called as catecholamines . These hormones are responsible for the appropriate physiological response to the situation.