Answer:
ExplanaIntroductory elements often require a comma, but not always. Use a comma in the following cases: After an introductory clause. After a long introductory prepositional phrase or more than one introductory prepositional phrase.tion:
Reduce the amount of time he spends playing video games by one hour
the fear of darkness is nyctophobia.
:)
It is NOT a prime number. It can't be divided by 5, if you need anymore help just ask me