Fact 1: Aplant requires nutrients to grow.

Fact 2: Nutrient density is the nutrient to calorie ratio of the food supply.

Given the two facts above, answer the question "A plant requires what to grow?" with the following options: 
- sunlight
 - freezing rain
 - water floods
 - soft voices
 - food supply
 - Energy.
 - salt and water.
 - direct energy


 

     food supply    