Fill in the following blanks with suitable words:
Food can also be broken down without using …………

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks us to fill in the blank in the statement "Food can also be broken down without using …………". We need to identify what is not required for the breakdown of food.

2. **Types of Respiration**: There are two main types of respiration: aerobic and anaerobic. Aerobic respiration requires oxygen, while anaerobic respiration does not.

3. **Identifying the Correct Term**: Since the statement mentions breaking down food without using something, we should focus on anaerobic respiration, which occurs in the absence of oxygen.

4. **Filling in the Blank**: Based on the understanding that anaerobic respiration does not require oxygen, we can fill in the blank with the word "oxygen".

5. **Final Answer**: The completed statement is: "Food can also be broken down without using oxygen."

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