Here are the correct answers based on the provided text:

1. **What did Cameron Oliver start when he was 11 years old?**
- **C. a campaign to save camels**

2. **In line 2, what does the word "contributions" mean?**
- **C. actions that help to cause or increase something**

3. **The main reason why Cameron Oliver became famous was that __________.**
- **B. he was very young**

4. **According to the text, the main goal of his campaign is to __________.**
- **A. protect camels from eating plastics**

5. **How did Cameron’s life change after he received the award?**
- **B. He did not have to open doors anymore.**

If you need further clarification or assistance, feel free to ask!