Answer: Inhibiting 
Explanation:
Psychoactive drugs are the substances which has the ability to alter the thoughts and mood of the person consuming them. These drugs includes tobacco, cocaine, heroin and cannabis.
These drugs work by inhibiting, mimicking or stimulating the neurotransmitters in the brain.
Its affect can be used to treat any medical condition related to the brain. It is also use to feel high or hallucinated.
 
        
             
        
        
        
I would say B, as morality is knowing the difference between right and wrong, and I think A would be an ethical issue
        
                    
             
        
        
        
  experiment, in the scientific method the hypothesis is tested through experimentation and if confirmed is called a theory.
        
             
        
        
        
Surface tension I think. which makes it feel like you are hitting concrete when you fall onto water from extreme heights.
        
                    
             
        
        
        
The enzyme DNA helicase is responsible for breaking the hydrogen’s bonds between DNA strands during the unwinding of the DNA.
The enzyme DNA polymerase is responsible for “reading” the template stand and adding corresponding nucleotides to replicate the DNA.