Race : Fatigue :: Fast : ?

Food
Laziness
Hunger
Race

The correct answer is A. Food.

The relationship between “race” and “fatigue” is that racing can cause fatigue. The relationship between “fast” and “food” is that eating food can give you energy, which can help you to move faster.

Option B, “laziness”, is incorrect because laziness is not a direct consequence of fasting. Option C, “hunger”, is incorrect because hunger is a feeling that you get when you need to eat, not when you are moving fast. Option D, “race”, is incorrect because racing is not a direct consequence of eating food.