Answer: D. Heat
Explanation : Water Vapor is a source of warmth, since the heat that is radiated from Earth is absorbed by the water vapor. This is why greenhouses use water vapor as well. 
 
        
             
        
        
        
The correct answer for the question that is being presented above is this one:
(1) viruses only: capsid, envelope with glycoproteins, capsomere (core protein)
<span>(2) host cell only: ribosome 
</span><span>(3) both: DNA, RNA, Protein</span>
        
             
        
        
        
Hi There! 
<span>Sentences with the word know
I think you're asking to write a sentences with the word know!
Example: I know you can do it Cutiepie
Example #2: Do you know who Ms.Cutiepie is?</span>
        
                    
             
        
        
        
D- Park Clean-ups is the correct answer to this question.
        
             
        
        
        
<span>a. constructed from thick aluminum walls that can control the nuclear reactions </span>