i want to say it is D. because i believe that they are nocturnal animals and they are found in deserts.
 
        
                    
             
        
        
        
Answer:
The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. 
Explanation:
Pluto did not possess the full characteristics of a regular planet 
I hope this helps 
 
        
                    
             
        
        
        
Soil liquefaction describes a phenomenon whereby a saturated or partially saturated  substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a liquid.
        
                    
             
        
        
        
Answer: Some geographic areas have obvious natural advantages that result in cluster formation. For example, proximity to a large port will attract exporting firms or areas rich in minerals will attract clusters of mining firms. In addition, there are three well-established reasons why firms choose locate in close proximity. The cost of transporting goods is reduced when firms are located close to their customers or suppliers. Input suppliers can exploit economies of scale in large clusters of downstream firms who, in turn, benefit from timely delivery and lower inventory costs.
Explanation: There are various types of clustering are that include:
^ Connectivity-based Clustering (Hierarchical clustering)
^ Centroids-based Clustering (Partitioning methods)
^ Distribution-based Clustering.
^ Density-based Clustering (Model-based methods)
^ Fuzzy Clustering.
^ Constraint-based (Supervised Clustering)
 
        
             
        
        
        
The United States of America is an example of a democratic country but with specific election process. Unlike other democratic country that its the people of the country decides who will be their president, USA elect their president through electoral college.