A colon because it's formal.
Answer:
Stop bullying now, take a stand, and lend a hand.
Explanation:
stand up for yourself or tell someone who you trust to help you!
Answer:
Try the 1st one, He details a dangerous setting.
у∈s you can change your answer on brainly just go to your profile
1. I'd say phosphorus was the key to the modern match.
2. It's difficult to choose between choice 1 and choice 4, but it's certainly more common than not to find a main idea in the first sentence of a paragraph, so I'll have to go with it took humans a long time to develop the match.