the nostrils catch the big dust particles while the small and escaped dust particles from nostrils stick to the mucous
        
             
        
        
        
Answer:
Sensitive questions will make the respondents cautious when answering the next question since they will still be thinking about it
Explanation:
The main aim of a survey is to collect or gather data that will increase knowledge in fields such as social research and Demography.
Thoughts, opinions and feelings are assessed. 
To get credible data, the respondents have to be truthful and unbiased in answering the questions.
Therefore, asking sensitive questions will lead to the respondents being biased and less truthful on answering later questions.
 
        
                    
             
        
        
        
My answer is carbon dioxide 
        
             
        
        
        
 a. cell shape- It is cell shape because not only are the other 3 nonsensical, the cytoskeleton is for the framework and movement of a cell.
        
             
        
        
        
Answer:
b.Bone remodeling
Explanation:
Bone remodeling is also known as bone metabolism is a process in which bones undergo bone resorption where old or mature bines tissue is removed from the skeleton and ossification (formation of new bone tissue).
Bone remodeling is a lifelong process that is influenced by the growth hormone/IGF-1 system that is stimulated when the body increases in size and  weight.
Hence, the correct answer is "b.Bone remodeling".