Which of the following factors increases the rate of respiration?

Options

A. Quantity of glucose
B. Temperature
C. `O_(2)` content
D. `CO_(2)` content

Answer

To determine which factor increases the rate of respiration, we will analyze the options provided and understand how each factor influences respiration.

### Step-by-Step Solution:

1. **Identify the Factors**: The question asks us to identify which factor increases the rate of respiration. The options given are likely temperature, oxygen content, and carbon dioxide content.

2. **Analyze Temperature**:
- Higher temperatures generally increase the rate of metabolic activities in organisms.
- As temperature rises, the kinetic energy of molecules increases, leading to faster biochemical reactions, including those involved in respiration.
- Therefore, an increase in temperature enhances the rate of respiration.

3. **Consider Oxygen Content**:
- While oxygen is essential for respiration, simply having more oxygen does not necessarily increase the rate of respiration beyond a certain point.
- In aerobic respiration, the rate is primarily dependent on the metabolic demand of the organism rather than just the availability of oxygen.

4. **Evaluate Carbon Dioxide Content**:
- High levels of carbon dioxide can actually inhibit respiration in plants.
- Therefore, an increase in carbon dioxide content does not enhance the rate of respiration.

5. **Conclusion**: Based on the analysis, the factor that significantly increases the rate of respiration is temperature. Thus, the correct answer is the second option, which is temperature.

### Final Answer:
The factor that increases the rate of respiration is **Temperature**.

---