Read the following statements:

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks us to evaluate a set of statements regarding the process of photosynthesis, specifically focusing on the role of ATPase and the creation of a proton gradient in the thylakoid membrane.

2. **Analyzing the First Statement**:
- The first statement claims that the F0 part of ATPase is associated with the breakdown of the proton gradient.
- In the thylakoid membrane, the F0 part of ATPase is indeed involved in the movement of protons (H⁺ ions) across the membrane, which is essential for ATP synthesis.
- **Conclusion**: This statement is true.

3. **Analyzing the Second Statement**:
- The second statement mentions that a hydrogen carrier contributes to the creation of a proton gradient.
- In the electron transport chain, carriers like plastoquinone transport electrons and also help in moving protons into the thylakoid lumen, thus increasing the concentration of protons inside the lumen compared to the stroma.
- **Conclusion**: This statement is also true.

4. **Analyzing the Third Statement**:
- The third statement asserts that the movement of electrons in the electron transport chain is coupled to the pumping of protons into the lumen.
- This is accurate because as electrons are transferred through the electron transport chain, protons are actively pumped into the lumen, contributing to the proton gradient necessary for ATP synthesis.
- **Conclusion**: This statement is true as well.

5. **Final Evaluation**:
- Since all three statements have been evaluated and found to be true, we conclude that all the statements provided in the question are correct.

### Final Answer:
All the statements given in the question are correct.

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