Unusual , sights, , appearances or are often the first sign of an emergency roles in an emergency may include giving first aid, or the designated emergency number, or getting equipment

Unusual sounds or noises, sights,smells or odors, appearances or behaviors are often

the first sign of an emergency.

Bystander roles in an emergency may include giving first aid, calling 9-1-1 or the designated emergency number, or getting equipment

( for example: A first aid kit).

Explanation:

answer; hydrologic cycle;