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Nuclear Fusion (physics Only) (GCSE Physics)

The following is a GCSE Physics test covering 'Nuclear Fusion (physics Only)' from the broader topic Atomic Structure. The test is geared towards the AQA exam board style syllabus.
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Which product of the D–T fusion reaction causes material damage and radioactivity in surrounding structures?
Which description best defines the “Coulomb barrier” in fusion?
Which of the following is a major engineering material problem for fusion power plants due to intense neutron flux?
Why is achieving net energy gain (Q > 1) in a fusion device challenging?
Which atomic-structure fact is true and important for understanding fusion fuel?
What is a realistic near-term technical aim for experimental fusion devices such as ITER?
How do inertial confinement fusion experiments attempt to achieve the conditions for fusion?
Which factor would LOWER the Coulomb barrier between two positively charged nuclei and thus help fusion?
In a deuterium–tritium fusion reaction, what is the kinetic energy carrier that mainly heats the plasma?
What is the Lawson criterion (in simple terms) relevant to fusion reactors?
Which statement correctly compares fusion with fission regarding radioactive waste?