Answer:
a tactile input device
Explanation:
Based on the scenario being described it can be said that the best assistive technology for Bernard would be a tactile input device. Such a device would allow Bernard to physically interact with the print on the chalkboard or overhead screen from the device itself without having to actually get close to the chalkboard or screen. Thus allowing him to view its content from the palm of his hand.
 
        
             
        
        
        
The interactive model of communication states that the people and the environment for communication are constantly changing. 
B. interactive
<u>Explanation:</u>
The world is a big place and you must have come across the infamous hearing, "Change is the only constant". Gradually, with the passage of time, the mindset of the people change over a certain topic for communication. 
For instance, in old times, people did not prefer their children to have love marriages, in fact India has also seen honor killings to prevent love marriages. But now most portion of the society stands in favor of love marriages. People change, perspective change, and so does the perception and ideas. 
 
        
             
        
        
        
Th e most important external issue when using social media in emergency management is the disaster response. Disseminating information through social media is very effective especially when there are calamities and a disaster respond from both private and public sector is very urgent.
        
             
        
        
        
Answer:
following types of databases available in the market −
Centralised database.
Distributed database.
Personal database.
End-user database.
Commercial database.
NoSQL database.
Operational database.
Relational database.
Cloud database.
Object-oriented database.
Graph database
 
        
                    
             
        
        
        
Answer: layout, section, number, more options
Explanation:
Just did it on edge 2020