The sense of sight and smell are the best ways to detect the presence of hazardous chemicals. This statement is the truth. Thus, the option (a) is correct.
What is chemicals?
The term chemicals refer to such the kind of the substance are the composition. the chemicals are the primary involved to the chlorine. The chemical are the also founded in the natural resources such as plants, minerals, and the water. 
The hazardous chemicals are the primary work of the sense of sight and smell detecting. There are the observation method to the analysis of the substance. The sight is the main observation of the eye because its the 80% impressions.
As a result, the hazardous chemicals are the detected the smell and sense are the statement are the truth. Therefore, option (a) is correct.
Learn more about chemicals, here;
brainly.com/question/23693316
#SPJ4
 
        
             
        
        
        
<span>A . The United States entered World War II.  is the answer</span>
        
             
        
        
        
What matters to Amadou is the number of cacao pods he and his younger brother, Seydou, can chop down in a day. The boys wanted to make money to help their impoverished family. It helps Amadou to become determined in doing so because the higher they can make, the closer they are to paying off their debt and returning home.
 
        
             
        
        
        
I think it is A, but I’m not sure, but I’m sorry if it’s wrong