Trade in the british empire and new inventions lead to
a. the reopening of theatres.
b. the birth of the industrial revolution.
c. the loss of the american colonies.
d. the end of puritan rule.

the solar system used to have much dust particles option no d

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.