The answer is. Soils play an important role in all of our natural ecological cycles—carbon, nitrogen, oxygen, water and nutrient.A handful of soil can contain billions of different organisms that play a critical role in soil quality to support plant growth.
        
             
        
        
        
A. Photosynthesis. Every plant can do this, fundamental process, and we can call, this, photosynthesis. I hope this helped you!
        
             
        
        
        
<span>The use of human cells in research can lead to ethical problems
Because the new use of cells most often lead to this "grey area" in ethics as it is a new area of science and our society is not yet conditioned to this scientific breakthough. As there is no "moral code" on human cell use, ethical objections can arise and led to conflicts.
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When looking at the other options they do not cause negative effects on society
1) </span><span>Immortal animal cell lines can be used to model human cells.
 ----> This technology is not yet developed so it cannot be negative (yet)
2) Organ culture increases the time between donation and transplant. 
-----> Organ culture are actualy </span><span>an alternative for organs from donors, and will not increase the time btween donation and transplant</span><span>
3) People are more aware of the results of cell technology research.
</span>-----> Awareness of research lead to greater understanding and unity
        
                    
             
        
        
        
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.