I believe it is D, the reason being is because they form on their own, not from a living or dead organism. It can't be B because that is true, and the same for C. hope this helps, have an amazing day :)
        
             
        
        
        
Exo means outside 
So planets outside our solar system
        
             
        
        
        
The limbic system is a region in the brain consisting of the thalamus, the hypothalamus, the hippocampus, and the amygdala.
When a person has amygdala damage, it would be expected to disrupt the integration of fear.
So, this kind of person will be efficient under fear situations avoiding emotional burnout.
Careers like bridge climbing or skydiving instructor are good for this kind of person.
 
        
             
        
        
        
Superficially, the connection between the cell cycle and cancer is obvious: cell cycle machinery controls cell proliferation, and cancer is a disease of inappropriate cell proliferation. Fundamentally, all cancers permit the existence of too many cells.
        
             
        
        
        
Answer:
PP, Pp
Explanation:
Use your finger to cross the two figures on the outside parts of the Punnett Square; there are only two options.
Those are your answers.
Hope this helps.
-Gumina