How can I get and keep a boyfriend??

hey

have a great day ahead:-)

find the right person and be yourself . don't try to be like other people or other couples. just vibe together and if it doesn't work then its not you, just focus on you and do you

Explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.