Which one of the following animals' front teeth keep on growing throughout its life? It has to keep gnawing on things to keep its teeth from becoming too long

Options

A. Termite
B. Squirrel
C. Lizard
D. Rat

Answer

To solve the question about which animal's front teeth keep growing throughout its life, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which animal has front teeth that continuously grow and needs to gnaw on things to prevent them from becoming too long.

2. **Identify Key Terms**: The key terms here are "front teeth," "keep on growing," and "gnawing." This suggests we are looking for a specific type of animal that has continuously growing incisors.

3. **Recall Animal Characteristics**: Some animals have incisors that grow throughout their lives. Common examples include rodents, rabbits, and squirrels. These animals need to gnaw on hard objects to wear down their teeth and prevent them from growing too long.

4. **Analyze the Options**: The options provided include various animals. We need to identify which of these animals is known for having continuously growing incisors.

5. **Select the Correct Animal**: Among the options, squirrels are known for having front teeth that keep growing. They are part of the rodent family, which is characterized by this trait.

6. **Conclusion**: Therefore, the correct answer to the question is that the animal whose front teeth keep growing throughout its life is the **squirrel**.

### Final Answer:
**Squirrel**