Does the sentence "The timing of migration seems to be controlled primarily by changes in day length." provide a valid answer to the question "What causes the timing of migration?"

A: yes

Does the sentence "Pig iron, a very hard but brittle alloy of iron and carbon, was being produced in China as early as 1200 BC, but did not arrive in Europe until the Middle Ages." provide a valid answer to the question "Pig iron is composed of iron and what else?"

A: yes

Does the sentence "The remaining restrictions were removed by 1995, 4 years after the introduction of the World Wide Web." provide a valid answer to the question "what happened to the internet in the late 1980s?"

A: no

Does the sentence "Rail routes run east towards Portsmouth, north to Winchester, the Midlands and London, and westwards to Bournemouth, Poole, Dorchester, Weymouth, Salisbury, Bristol and Cardiff." provide a valid answer to the question "In which direction do trains run from Southampton to Winchester?"

A:
yes