Why is it important for scientists to state a conclusion?

I'd say a

Explanation:

A conclusion is just reiderating their points, not really proving reliability to other scientists. A conclusion wouldnt be to make an educated guess, either. it could possibly be c too, but i dont think concluding comments would be to explain exactly why it was performed, more like an end note and close to all their points. I'd go with a.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.