Answer:
Friends
Children
younger people
Explanation:
You are INFORMAL when you are talking to people your age or younger than you.
The system of units of capacity ordinarily used in measuring liquid commodities, as milk or oil. English system: 4 gills = 1 pint; 2 pints = 1 quart; 4 quarts = 1 gallon. Metric system: 1000 milliliters = 1 liter; 1000 liters = 1 kiloliter (= 1 cubic meter).