Explanation:
The activities in which human beings are engaged in different kinds of economic works to generate income are called economic activities. 
or in simple words
Any work from which we can generate income are called economic activities
hope this helps you
 
        
                    
             
        
        
        
Are you missing part of the question or is this simply a fun fact
        
             
        
        
        
This is normally how a conversation takes place between parents and their child while asking for permission.
The phone rings and Rohan’s mother picks up the call.
Rohan (son) : Mom I need to ask you something.
Mother: What is it son?
Rohan: Mom you known that I’m at my friend’s place for his birthday celebration. . .
Mother : Yes. So? What’s the matter?
Rohan : So can I just stay at my friend’s house for tonight?
Mother : No. I’ve permitted you to go at his party, but I can’t permit you to stay at his place.
Rohan : Mom please mom, it is my friend who insisted me to stay by. Rest of my friends are also staying, and their parents even agreed.
Mother : Fine. You may stay, but make sure you don’t involve in any kind of mischievous behavior. And be back tomorrow early morning. You get that?
Rohan : Yes mom. Thank you so much. You’re the best mom.
And they hung up the call !!
 
        
             
        
        
        
Answer:
Fish tank: Durability (glass)
Math Book: durability (wood etc)
Gum: Flexibility (food and sugar)
Explanation:
 
        
             
        
        
        
Is this school or what (btw sorry for answering as an answer no one else did)