In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.

Fact: photosynthesis makes food for the plant by converting carbon dioxide, water, and sunlight into carbohydrates. Question: Which of the following is never an element used to make carbohydrates for the plant?
sand

Fact: a hot substance is a source of heat. Question: Using your electronic that uses batteries for long periods of time makes them get very hot to the touch, which makes it a?
source of warmth

Fact: something in a cold place becomes cold. Question: Skittles left in snow become?
hard