Participating in moderate to vigorous physical activity at least five days a week is paramount in achieving a healthy lifestyle.
in this sentence, what does the word paramount mean?
least effective
well supported
most important
not necessary

In the above sentence, the word paramount mean MOST IMPORTANT.

Paramount is an adjective word that is synonymous to the word supreme. This means it is more important above anything else.

In the above sentence, it simply implies that living a healthy lifestyle includes participating in moderate to rigorous physical activities like exercising or playing sports.  

Bulling? or do you mean bullying?