A words history of a origin and development of its meaning
        
                    
             
        
        
        
 Answer:
Environmental scientists look for solutions to protect the environment, while chemists develop new products. 
Explanation:
The last two sentences use the conjunction while meaning <em>whereas</em>, i.e. indicating a contrast. So the purpose of sentences 3 and 4 is to contrast certain things about environmental scientists and chemists. However, the fourth sentence contrasts only <u>level of education</u> required for these jobs.
The third sentence refers to <u>actual</u> <u>work</u> that environmental scientists and chemists do. Therefore, this sentence most accurately describes a way in which the jobs of environmental scientists and chemists contrast.
 
        
             
        
        
        
Answer:
model c has the best molecular structure. Undefined model A.
Explanation:
This is because model b doesn't have molecules.
 
        
             
        
        
        
Answer:
A (on the phone): Honey, I (be) <u>will be</u> home late tonight. There’s a problem at work. B: That’s OK. I (not, start) <u>will not start </u>to make dinner until you (come) <u>come</u>  home.
Explanation:
If you say " i be home late tonight" Your sentance won't make sence. You could also use " I'll " but if your talking about the future you'll have to use " Will "
<u>Hope this helped you!!</u>
 
        
             
        
        
        
Answer:
The United States may deport foreign nationals who participate in criminal acts, are a threat to public safety, or violate their visa.
Explanation: