What are the four basic ingredients in most beer?

Answer: Water, grain, hops, and yeast

Water, grain, hops, and yeast ✓ — Correct! Almost all beer is just four things: water, a malted grain (usually barley), hops, and yeast. The yeast eats the grain's sugars and turns them into alcohol and CO2; hops add bitterness and aroma. Germany's centuries-old purity law even limited beer to these basics.

Barley, rice, and sparkling water — Wrong. Rice or corn are sometimes added as cheaper extras, and the bubbles form naturally during fermentation. The real backbone is grain, hops, water, and yeast.

Water, sugar, and food coloring — Wrong. Sugar and dye aren't the base. Beer's sugars come from malted grain, and its color comes from how much that grain is roasted, not from added coloring.