I'd say the answer is the top right. The actual definition of "Stimulation" is "encouragement of something to make it develop or become more active"
 
        
             
        
        
        
Mawi's father was afraid that the Ethiopian army was going to make him a nurse for the army. He could not take his family because it would too much time and he wanted to keep them safe.
        
             
        
        
        
Answer: Showing 
Explanation:
 in English ending in -ing, e.g.,
 
        
             
        
        
        
The correct answer here is "in the air". This phrase acts as an adverb of place as it describes where the virus is located. These phrases can modify a verb, adverb and adjectives and tells us more information about them like in this example "where" something is. They can also tell us about "how" or "when" or "why".