question: What sentence would provide a factual answer to this question: "Which would likeliest eat a sardine?"

answer: tuna eat fish

question: What sentence would provide a factual answer to this question: "When a song is played your ears can"

answer: when sound reaches the ear , that sound can be heard

question: What sentence would provide a factual answer to this question: "The best time to have an all-day BBQ in the northern hemisphere is"

answer:
the amount of daylight is greatest on the summer solstice