I think you forgot to give the options along with the question. I am answering the question based on my research and knowledge. The primary concern of developmental psychologists is the <span>changes that occur throughout a person's life span. I hope that this is the answer that has actually come to your help.</span>
Answer:
The user experience or the user activities
Explanation:
One concern that must be considered when designing usable interactive products apart from the points raised here is that the user experience and the activities the user will be doing when they are interacting with the products must also be considered. For instance, a user who is having a drink in one hand and the usable interactive product requires involving both hands or both thumbs then it can be a problem unless the product can be used with any two fingers of any hand.
The correct answer for number 4. is B. Because of more people the more food they buy from the store.
Give me a minute for number 5.
